Top Inventors in El Cajon, CA | Patent Leaderboard

El Cajon, CA ranks #1,610 worldwide for total patents filed all time, with 2,076 patents from 572 inventors. Leading employers of inventors based in El Cajon, CA include Sony, Fox Factory, Western Digital Technologies. That works out to 19.6 patents per 1,000 residents, a common benchmark for comparing regional innovation intensity.

Showing 1–50 of 572 inventors

Rank	Inventor	Primary Company	Patents
1	Robert Allan Unger	Sony	71
1	John Marking	Fox Factory	71
3	George J. Bennett	Western Digital Technologies	56
3	Darryl C. Galvan	Acushnet	56
#5	Nigel P. Cook	Qualcomm	54
#6	Harvey J. Nickerson	Rain Bird	53
#7	John Francis Lorentzen	Taylor Made Golf Company	45
#8	David A. Hazlebeck	General Atomics	34
#9	Mark Knuth	Mycogen	33
#10	Ken Wilson	Wilson Tool International	31
#11	Rory Smith	Thyssen Elevator Capital	30
#12	John V. Long	International Harvester	27
#13	Jack Barger	Sony	21
#13	Theodore Garry Stern	—	21
#13	Rani A. Chaoui	Inhale	21
#13	Alexander Dorosenco	Qualcomm	21
#17	Santosh Y. Limaye	Phyre Technologies	18
#17	Michael Sean Pretty	Rohr	18
#17	Steven G. Leiserson	Unknown	18
#20	Mark Livesay	Sunrez	16
#20	Daniel O. Ursenbach	Rohr	16
#22	Donald Felt Kimball	Psemi	15
#23	Ronald D. Maurer	Three Amigos	14
#23	Christopher E. Brennan	Hoist Fitness Systems	14
#25	Tam Nguyen	Robertshaw Controls	13
#25	Gregory Piedmont	Lockheed Martin	13
#27	Jesse O. Casares	Seescan	12
#27	Bruce E. Taber	Philips	12
#29	John W. Roorda	Westek	11
#29	James A. Lehman	—	11
#29	Eric P. Linn	Buck Knives	11
#29	Philip R. Linquist	Jeld-Wen	11
#29	Lynn Chenowth	—	11
#34	Eugene L. Rope	—	10
#34	Mark E. Bonebright	Cubic Defense Systems	10
#34	Stanley C. Aguilar	Nordson	10
#34	William Kousens	—	10
#34	Eric Stevens	Honda Motor Co.	10
#34	Nathan Taylor	Cnh Industrial America	10
#34	William H. Keys	Buck Knives	10
#41	Max J. Dykmans	—	9
#41	Jason Edward Brittain	Cephalon	9
#41	Richard Moore	Amada America	9
#41	Robert A. Shannon	Cymer	9
#41	Richard E. Showalter	Agouron Pharmaceuticals	9
#41	Harry V. Todd	Lucas Industries Public Limited	9
#41	Mark Timothy Ott	Subseasail	9
#48	Eric Andrew Nager	Hamilton Sundstrand	8
#48	Philip James Sluder	Quicklaunch	8
#48	Charles Greg Deering	Deering Banjo Company	8

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