Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David E. Fowler — 31 Patents

QHQuadrex Hps: 9 patents #1 of 5Top 20%
W(Western Digital (Fremont): 6 patents #112 of 473Top 25%
WTWestern Digital Technologies: 5 patents #666 of 3,180Top 25%
MAMaxtor: 4 patents #96 of 656Top 15%
UNUnknown: 1 patents #29,356 of 83,584Top 40%
GIGeneric Imaging: 1 patents #7 of 12Top 60%
STSeagate Technology: 1 patents #3,252 of 4,701Top 70%
Gainesville, FL: #45 of 2,267 inventorsTop 2%
Florida: #1,261 of 67,251 inventorsTop 2%
Overall (All Time): #115,823 of 4,157,543Top 3%
31 Patents All Time
David E. Fowler has been granted 31 US patents while listed as an inventor at Quadrex Hps. The first was granted in 1984 and the most recent in January 2021. David E. Fowler ranks #115,823 of 4,157,543 US inventors in our database (top 2.8%). Patent records list David E. Fowler in Gainesville, FL, US.

Issued Patents All Time

Showing 1–25 of 31 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10891981 Air-bearing surface designs with a curved trailing air flow dam Yong Hu, Weidong Huang, Taichi Nakamura 2021-01-12 $15,154,000
10714135 Air-bearing surface designs with a curved trailing air flow dam Yong Hu, Weidong Huang, Taichi Nakamura 2020-07-14 $11,627,000
8902533 Disk drive detecting different asperities on a disk using different sensor bias settings Carl E. Barlow, Chun Sei Tsai, Chirag C. Patel, Boon Sien Chew, Thomas A. O'Dell +1 more 2014-12-02 $11,207,000
8861317 Heat assisted magnetic recording transducer having protective pads Wentao Yan, Yu-Nan Lo 2014-10-14 $7,288,000
8797667 Disk drive calibrating bias signal for touchdown sensor Carl E. Barlow, Chun Sei Tsai, Thomas A. O'Dell, David Wachenschwanz, Balvinder Singh 2014-08-05 $9,261,000
8760814 Disk drive head suspension assembly having a DLC coating between dimple and tongue Tzong-Shii Pan, John E. Scura, Yanning Liu 2014-06-24 $6,926,000
8749920 Magnetic recording head with dynamic fly height heating and having thermally controlled pole tip protrusion to control and protect reader element Neil D. Knutson, Yu-Nan Lo 2014-06-10 $14,825,000
8649249 Printing magnetic pattern onto disk Erhard Schreck, Michael Mallary 2014-02-11 $13,097,000
8643980 Micro-actuator enabling single direction motion of a magnetic disk drive head Mark R. Bragen 2014-02-04 $27,034,000
8456643 Method and system for mapping the shape of a head under operating conditions Vijay Prabhakaran, Wuxing Gan, Ladislav R. Pust, Lanshi Zheng 2013-06-04 $7,993,000
8404099 Electrolysis of spent fuel pool water for hydrogen generation 2013-03-26
7800858 Differential head integrated touchdown sensors for hard disk drives Sateeshchandra S. Bajikar 2010-09-21 $12,381,000
7796356 Head integrated touchdown sensor for hard disk drives Sateeshchandra S. Bajikar 2010-09-14 $47,669,000
7355814 Disk texture located in load/unload zone of disk for cleaning contamination and disk lubricant from head ABS surface Erhard Schreck 2008-04-08
6760191 Internal heat dissipater used to reduce slider and write pole thermal protrusion for thin film recording heads Wentao Yan 2004-07-06 $6,090,000
6654205 Air bearing surface for reducing pressure gradients Matthew O'Hara 2003-11-25 $40,994,000
6214070 Disk drive filter Mark S. Crowder, Robert D. Turner, Paul D. Mischo 2001-04-10 $15,847,000
5554520 Ethanol production by recombinant hosts Philip G. Horton, Arie Ben-Bassat 1996-09-10
5487989 Ethanol production by recombinant hosts Philip G. Horton, Arie Ben-Bassat 1996-01-30
5333855 Baseball pitching analyzer Connie J. Silin 1994-08-02
5159455 Multisensor high-resolution camera John D. Cox 1992-10-27
4913178 Process and apparatus for removing PCB's from electrical apparatus 1990-04-03 $361,000
4865061 Decontamination apparatus for chemically and/or radioactively contaminated tools and equipment Charles R. Witt 1989-09-12 $715,000
4842746 Method of removing toxic agents for trichlorotrifluoroethane Eugene T. McIlvaine 1989-06-27 $877,000
4797128 Method of and apparatus for cleaning garments and soft goods contaminated with nuclear, chemical and/or biological contaminants 1989-01-10 $740,000