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

Mark Spencer — 3 Patents

SOSolfocus: 1 patents #8 of 19Top 45%
San Jose, CA: #14,697 of 32,062 inventorsTop 50%
California: #150,760 of 386,348 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Mark Spencer has been granted 3 US patents while listed as an inventor at Solfocus. The first was granted in 2003 and the most recent in November 2025. Mark Spencer ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Mark Spencer in San Jose, CA, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
12462624 Systems and methods for monitoring a condition of an engine 2025-11-04
7473000 Shield for solar radiation collector Stephen J. Horne 2009-01-06
6595003 Process and apparatus for control of NOx in catalytic combustion systems Ralph A. Dalla Betta, Sarento G. Nickolas, Timothy Caron, Jon McCarty, Robert Anthony Corr, II 2003-07-22