Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Brian C. Preston — 5 Patents

CACalcomp: 2 patents #16 of 71Top 25%
SGSanders Gmbh: 2 patents #37 of 158Top 25%
OPOpower: 1 patents #37 of 78Top 50%
San Leandro, CA: #128 of 574 inventorsTop 25%
California: #107,996 of 386,348 inventorsTop 30%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Brian C. Preston has been granted 5 US patents while listed as an inventor at Calcomp. The first was granted in 1986 and the most recent in May 2018. Brian C. Preston ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Brian C. Preston in San Leandro, CA, US.

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9958360 Energy audit device Arjun Dasgupta, Niklas Philipsen, Euan Davidson, Jared Culp, Matt Greenfield 2018-05-01
5345255 Actuator mechanism for a plotter carriage Patrick Nguyen 1994-09-06 $236,000
5245363 Pen cleaning system for a pen plotter John M. Bertalan, Patrick Nguyen 1993-09-14 $348,000
4691605 Cutter assembly with rotating knife blade Anatoly Vanetik 1987-09-08
4621535 Forward engagement and reverse disengagement device Bruce A. Bronson 1986-11-11