The 100 known most prolific inventors based on worldwide utility patents are shown in the following table. While in many cases this is the number of utility patents granted by the United States Patent and Trademark Office, it may include utility patents granted by other countries, as noted by the source references for an inventor.
Inventor | Pats | Fams | Fam % | Pat Yrs | Yrs | Pat /Yr | Inv /Pat | Pat Residence | Majority Assignment | ||
---|---|---|---|---|---|---|---|---|---|---|---|
Shunpei Yamazaki | [1] | 6376 | 2821 | 44.2% | 1972—2024 | 52.3 | 122 | 3.6 | Japan | Semiconductor Energy Laboratory | |
Kia Silverbrook | [2] | 4747 | 1311 | 27.6% | 1994—2014 | 20 | 237 | 1.6 | Australia | Silverbrook Research | |
Tao Luo | [3] | 3395 | 2852 | 84.0% | 2006—2024 | 18.2 | 187 | 5.6 | United States | Qualcomm | |
Kangguo Cheng | [4] | 2739 | 1499 | 54.7% | 2004—2024 | 19.7 | 139 | 3.9 | United States | IBM | |
Frederick E. Shelton IV | [5] | 2369 | 1120 | 47.3% | 2005—2024 | 19.1 | 124 | 4.5 | United States | Ethicon | |
Junyi Li | [6] | 2180 | 1848 | 84.8% | 2002—2024 | 21.8 | 100 | 5.2 | United States | Qualcomm | |
Peter Gaal | [7] | 2145 | 1651 | 77.0% | 2002—2024 | 22 | 98 | 5.9 | United States | Qualcomm | |
Wanshi Chen | [8] | 2033 | 1573 | 77.4% | 2009—2024 | 15.3 | 133 | 5.7 | United States | Qualcomm | |
Lowell L. Wood, Jr. | [9] | 1995 | 1325 | 66.4% | 1971—2024 | 52.8 | 38 | 8.8 | United States | Intellectual Ventures | |
Roderick A. Hyde | [10] | 1890 | 1252 | 66.2% | 2001—2024 | 23.2 | 81 | 8.7 | United States | Intellectual Ventures | |
Chen-Hua Yu | [11] | 1732 | 938 | 54.2% | 1996—2024 | 28.2 | 61 | 4.9 | TSMC | ||
Hanbyul Seo | [12] | 1633 | 1195 | 73.2% | 2012—2024 | 12.3 | 133 | 3.8 | LG | ||
Xiaoxia Zhang | [13] | 1612 | 1399 | 86.8% | 2009—2024 | 15.6 | 103 | 5.5 | United States | Qualcomm | |
Esmael H. Dinan | [14] | 1518 | 645 | 42.5% | 2006—2024 | 18.1 | 84 | 3.6 | United States | Ofinno | |
Jun Koyama | [15] | 1490 | 619 | 41.5% | 1991—2024 | 33.1 | 45 | 3.1 | Japan | Semiconductor Energy Laboratory | |
Gurtej Singh Sandhu | [16] | 1427 | 584 | 40.9% | 1991—2024 | 33 | 43 | 2.5 | United States | Micron | |
Jing Sun | [17] | 1350 | 1147 | 85.0% | 2012—2024 | 11.6 | 116 | 5.9 | United States | Qualcomm | |
Paul Lapstun | [18] | 1304 | 246 | 18.9% | 2000—2023 | 23 | 57 | 2.5 | Australia | Silverbrook Research | |
Shou-Shan Fan | [19] | 1303 | 1089 | 83.6% | 2006—2024 | 18.3 | 71 | 4.2 | China | Hon Hai | |
Sarbajit K. Rakshit | [20] | 1279 | 1064 | 83.2% | 2013—2024 | 11.6 | 110 | 3.4 | India | IBM | |
Clarence T. Tegreene | [21] | 1247 | 903 | 72.4% | 2000—2024 | 23.7 | 53 | 10.1 | United States | Intellectual Ventures | |
Alexander Reznicek | [22] | 1236 | 737 | 59.6% | 2006—2024 | 18.2 | 68 | 3.9 | United States | IBM | |
Satoshi Seo | [23] | 1171 | 555 | 47.4% | 2002—2024 | 21.7 | 54 | 4.1 | Japan | Semiconductor Energy Laboratory | |
Suckchel Yang | [24] | 1148 | 743 | 64.7% | 2013—2024 | 11.1 | 103 | 4.7 | LG | ||
Kijun Kim | [25] | 1141 | 793 | 69.5% | 2013—2024 | 10.6 | 108 | 4.6 | LG | ||
Shan Liu | [26] | 1130 | 759 | 67.2% | 2013—2024 | 10.9 | 104 | 3.4 | United States | Tencent | |
Leonard Forbes | [27] | 1109 | 411 | 37.1% | 1975—2019 | 43.3 | 26 | 2.6 | United States | Micron | |
Edward K. Y. Jung | [28] | 1109 | 794 | 71.6% | 1996—2023 | 27.4 | 40 | 8.0 | United States | Intellectual Ventures | |
Joonkui Ahn | [29] | 1108 | 724 | 65.3% | 2013—2024 | 11.1 | 100 | 4.7 | LG | ||
Thomas Edison | [30] | 1084 | NA | NA | 1869—1933 | 63.9 | 17 | 1.0 | United States | Thomas Edison | |
Juan Montojo | [31] | 1069 | 874 | 81.8% | 2004—2024 | 20.5 | 52 | 6.9 | United States | Qualcomm | |
Rick Allen Hamilton II | [32] | 1062 | 714 | 67.2% | 1999—2024 | 25 | 42 | 4.2 | United States | IBM | |
Marta Karczewicz | [33] | 1053 | 869 | 82.5% | 2000—2024 | 23.6 | 45 | 4.0 | United States | Qualcomm | |
Jason L. Harris | [34] | 1017 | 601 | 59.1% | 2011—2024 | 13.6 | 75 | 6.0 | United States | Ethicon | |
Ruilong Xie | [35] | 1014 | 754 | 74.4% | 2013—2024 | 11.5 | 88 | 4.2 | United States | IBM | |
Donald E. Weder | [36] | 1000 | 395 | 39.5% | 1978—2015 | 37.1 | 27 | 1.1 | United States | Weder Family Trust | |
Jason K. Resch | [37] | 1000 | 501 | 50.1% | 2009—2024 | 15 | 67 | 4.2 | United States | IBM | |
George Albert Lyon | [38] | 993 | NA | NA | 1901—1965 | 64.5 | 15 | 1.0 | Canada | Lyon George Albert | |
Michael J. Sullivan | [39] | 993 | 534 | 53.8% | 1989—2024 | 34.9 | 28 | 3.8 | United States | Acushnet Holdings | |
Jordin T. Kare | [40] | 989 | 640 | 64.7% | 1992—2024 | 31.8 | 31 | 9.1 | United States | Intellectual Ventures | |
Tingfang Ji | [41] | 987 | 732 | 74.2% | 2006—2024 | 18 | 55 | 6.9 | United States | Qualcomm | |
Jay S. Walker | [42] | 979 | 422 | 43.1% | 1998—2024 | 26.3 | 37 | 5.2 | United States | Walker Digital | |
Yunjung Yi | [43] | 977 | 692 | 70.8% | 2015—2024 | 8.7 | 112 | 3.3 | LG | ||
Takahiro Nishi | [44] | 974 | 348 | 35.7% | 2001—2024 | 23 | 42 | 6.3 | Japan | Panasonic | |
John F. O'Connor | [45] | 949 | NA | NA | 1901—1935 | 33.9 | 28 | NA | United States | William H. Miner | |
Ahmadreza Rofougaran | [46] | 948 | 460 | 48.5% | 2002—2024 | 22.1 | 43 | 6.4 | United States | Broadcom | |
Melvin De Groote | [47] | 925 | NA | NA | 1924—1966 | 41.8 | 22 | NA | United States | Petrolite | |
Seungmin Lee | [48] | 917 | 673 | 73.4% | 2014—2024 | 9.8 | 94 | 3.5 | LG | ||
David R. Hall | [49] | 909 | 754 | 82.9% | 1985—2024 | 39 | 23 | 3.8 | United States | Hall Labs | |
Nathan Myhrvold | [50] | 905 | 613 | 67.7% | 1994—2024 | 29.7 | 30 | 11.1 | United States | Intellectual Ventures | |
William H. Eby | [51] | 899 | 895 | 99.6% | 1994—2024 | 30.2 | 30 | 1.2 | United States | Monsanto | |
Hao Xu | [52] | 899 | 643 | 71.5% | 2005—2024 | 19.3 | 47 | 4.7 | China | Qualcomm | |
Francis H. Richards | [53] | 894 | NA | NA | 1899—1930 | 30.8 | 29 | NA | United States | Francis H. Richards | |
Mark Malamud | [54] | 885 | 690 | 78.0% | 1997—2023 | 25.9 | 34 | 7.5 | United States | Intellectual Ventures | |
Hajime Kimura | [55] | 883 | 280 | 31.7% | 2002—2024 | 21.7 | 41 | 2.6 | Japan | Semiconductor Energy Laboratory | |
Robert W. Lord | [56] | 866 | 682 | 78.8% | 2003—2024 | 20.4 | 42 | 7.6 | United States | Intellectual Ventures | |
Hongyuan Zhang | [57] | 858 | 473 | 55.1% | 2009—2024 | 15.3 | 56 | 3.9 | United States | Marvell | |
Royce A. Levien | [58] | 854 | 666 | 78.0% | 1997—2023 | 25.9 | 33 | 6.8 | United States | Intellectual Ventures | |
Muriel Y. Ishikawa | [59] | 839 | 560 | 66.7% | 2002—2024 | 22 | 38 | 11.1 | United States | Intellectual Ventures | |
Michael K. Gschwind | [60] | 836 | 442 | 52.9% | 2001—2024 | 23.2 | 36 | 2.6 | United States | IBM | |
Clifford A. Pickover | [61] | 834 | 548 | 65.7% | 1992—2024 | 32.3 | 26 | 3.9 | United States | IBM | |
Chih-Chao Yang | [62] | 834 | 519 | 62.2% | 2003—2024 | 20.6 | 40 | 3.4 | United States | IBM | |
Lee D. Whetsel | [63] | 832 | 128 | 15.4% | 1991—2024 | 33.3 | 25 | 1.1 | United States | Texas Instruments | |
Devendra K. Sadana | [64] | 811 | 457 | 56.4% | 1983—2024 | 41.5 | 20 | 4.3 | United States | IBM | |
SungDuck Chun | [65] | 790 | 482 | 61.0% | 2007—2024 | 16.7 | 47 | 3.8 | LG | ||
Salman Akram | [66] | 783 | 290 | 37.0% | 1995—2024 | 29.1 | 27 | 2.9 | United States | Micron | |
Warren M. Farnworth | [67] | 774 | 289 | 37.3% | 1990—2020 | 24.4 | 32 | 2.8 | United States | Micron | |
Youngdae Lee | [68] | 774 | 611 | 78.9% | 2014—2024 | 10.4 | 74 | 3.1 | LG | ||
Stuart C. Salter | [69] | 771 | 723 | 93.8% | 2009—2024 | 14.7 | 52 | 4.8 | United States | Ford | |
James A. Jorasch | [70] | 770 | 310 | 40.3% | 1994—2024 | 29.8 | 26 | 3.9 | United States | Walker Digital | |
Hsien-Wei Chen | [71] | 767 | 381 | 49.7% | 2005—2024 | 19.5 | 39 | 3.5 | TSMC | ||
Bruce B. Doris | [72] | 763 | 433 | 56.7% | 1995—2023 | 28.7 | 27 | 4.2 | United States | IBM | |
Jeyhan Karaoguz | [73] | 757 | 371 | 49.0% | 1996—2024 | 27.5 | 28 | 4.6 | United States | Broadcom | |
Justin T. Mason | [74] | 755 | 751 | 99.5% | 2008—2024 | 15.7 | 48 | 1.0 | United States | MS Technologies | |
Carleton Ellis | [75] | 753 | NA | NA | 1902—1946 | 43.1 | 17 | NA | United States | Ellis Foster Co | |
Yan Zhou | [76] | 752 | 671 | 89.2% | 2012—2024 | 11.9 | 63 | 4.4 | United States | Qualcomm | |
Ali Khakifirooz | [77] | 751 | 407 | 54.2% | 2011—2024 | 12.9 | 58 | 4.2 | United States | IBM | |
Xue Dong | [78] | 744 | 727 | 97.7% | 2010—2024 | 13.6 | 55 | 7.4 | China | BOE | |
John M. Santosuosso | [79] | 738 | 466 | 63.1% | 2001—2024 | 22.5 | 33 | 3.9 | United States | IBM | |
Hideo Ando | [80] | 733 | 123 | 16.8% | 1983—2020 | 36.7 | 20 | 3.1 | Japan | Toshiba | |
Satoshi Nagata | [81] | 726 | 689 | 94.9% | 2011—2024 | 12.8 | 57 | 4.0 | Japan | NTT | |
George Spector | [82] | 723 | 723 | 100% | 1974—1998 | 24.6 | 29 | 2.1 | United States | George Spector | |
Jean-Philippe M. Vasseur | [83] | 721 | 585 | 81.1% | 2006—2024 | 18.3 | 39 | 2.6 | France | Cisco Systems | |
Austin L. Gurney | [84] | 718 | 182 | 25.3% | 1999—2021 | 21.6 | 33 | 2.9 | United States | Genentech | |
Shougo Sato | [85] | 717 | 279 | 38.9% | 1992—2024 | 31.8 | 23 | 1.8 | Japan | Brother | |
Frederick A. Ware | [86] | 716 | 226 | 31.6% | 1981—2024 | 42.7 | 17 | 2.8 | United States | Rambus | |
Lisa Seacat DeLuca | [87] | 708 | 513 | 72.5% | 2009—2024 | 15.4 | 46 | 2.7 | United States | IBM | |
Gregory J. Boss | [88] | 708 | 485 | 68.5% | 2008—2024 | 16.4 | 43 | 4.2 | United States | IBM | |
Tetsujiro Kondo | [89] | 700 | 528 | 75.4% | 1987—2021 | 34 | 21 | 3.8 | Japan | Sony | |
Kyungmin Park | [90] | 700 | 375 | 53.6% | 2014—2024 | 10.3 | 68 | 5.2 | United States | Ofinno | |
Elihu Thomson | [91] | 696 | NA | NA | 1899—1935 | 35.9 | 19 | NA | United States | GE | |
Chung-Shi Liu | [92] | 690 | 377 | 54.6% | 2000—2024 | 24.5 | 28 | 6.1 | TSMC | ||
Irwin Gerszberg | [93] | 682 | 312 | 45.7% | 1994—2024 | 30.3 | 23 | 6.8 | United States | AT&T | |
Eric C. Leuthardt | [94] | 679 | 458 | 67.5% | 2006—2024 | 17.8 | 38 | 9.1 | United States | Intellectual Ventures | |
Paul S. Henry | [95] | 657 | 301 | 45.8% | 1978—2024 | 46.3 | 14 | 6.3 | United States | AT&T | |
Xiaochuan Chen | [96] | 656 | 639 | 97.4% | 2014—2024 | 10.1 | 65 | 7.0 | China | BOE | |
Woosuk Ko | [97] | 656 | 256 | 39.0% | 2015—2024 | 9.3 | 71 | 3.4 | LG | ||
William I. Wood | [98] | 653 | 259 | 39.7% | 1981—2013 | 32.2 | 20 | 5.2 | United States | Genentech | |
Simon R. Walmsley | [99] | 651 | 171 | 26.3% | 1995—2012 | 17.2 | 38 | 3.2 | Australia | Silverbrook Research | |
Aleksandar Damnjanovic | [100] | 651 | 479 | 73.6% | 2003—2024 | 21 | 31 | 4.4 | United States | Qualcomm |
The columns are defined as follows:
This table is a sortable list of the most prolific inventors as measured by utility patents granted. It does not include other types of invention, such as inventions that were never applied for nor granted, for which there is no known source. Nor does the table attempt to measure the significance of an inventor and their inventions. The significance of inventions is often not apparent until many decades after the invention has been made. For recent inventors, it is not yet possible to determine their place in history.
Rankings of prolific inventors have been published at various times. However, until the patent records were digitized, these lists were very tedious to prepare, as many thousands of patent records had to be checked manually. Even after digitization, it is still not a simple process. While the USPTO keeps statistics for annual rankings of inventions assigned to companies, it no longer publishes rankings of individual inventors. The last such list was published by the USPTO in 1998.[101] Also, patents predating 1976 have not yet been digitized in the USPTO records. This means that patents before 1976 will not be included in a USPTO search by inventor name, and the number of patents granted before 1976 must be added to current searches.
A more extensive list of prolific inventors with additional information and ability to filter on country, gender, time period, patent type, and Nobel laureate title can be found at . There are some discrepancies with this article due to different inventor queries that attempt to account for data issues such as typos and multiple inventors with the same name.