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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DS

David E. Stevenson — 10 Patents

PHPhotran: 3 patents #2 of 7Top 30%
VFViratec Thin Films: 2 patents #9 of 27Top 35%
Asheville, NC: #48 of 539 inventorsTop 9%
North Carolina: #5,314 of 45,564 inventorsTop 15%
Overall (All Time): #481,000 of 4,157,543Top 15%
10 Patents All Time
David E. Stevenson has been granted 10 US patents while listed as an inventor at Photran. The first was granted in 1990 and the most recent in November 2015. David E. Stevenson ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list David E. Stevenson in Asheville, NC, US.

Patents per Year

Patents granted per year, 1990 to 2015Bar chart with a peak of 3 patents in 2010.peak 31990: 1 patents19901992: 1 patents19921993: 1 patents19931994: 1 patents19941995: 1 patents19951996: 1 patents19962010: 3 patents20102015: 1 patents2015

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
D743480 Guitar strap 2015-11-17
7790060 SiOx:Si composite material compositions and methods of making same Li Qin Zhou 2010-09-07
7749406 SiOx:Si sputtering targets and method of making and using such targets Li Qin Zhou 2010-07-06
7658822 SiOx:Si composite articles and methods of making same Li Qin Zhou 2010-02-09
5541770 Light attenuating anti-reflection coating including electrically conductive layers Samuel F. Pellicori 1996-07-30 $612,000
5421979 Load-lock drum-type coating apparatus 1995-06-06
5328585 Linear planar-magnetron sputtering apparatus with reciprocating magnet-array Geoffrey H. Humberstone 1994-07-12
5200049 Cantilever mount for rotating cylindrical magnetrons Erik J. Bjornard, Geoffrey H. Humberstone 1993-04-06 $339,000
5100527 Rotating magnetron incorporating a removable cathode Erik J. Bjornard, Geoffrey H. Humberstone 1992-03-31 $174,000
4966062 Guitar support apparatus Robert H. Driggers 1990-10-30