Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DS

David C. Schmidt

Sony: 6 patents #6,793 of 25,231Top 30%
San Francisco, CA: #8,108 of 26,999 inventorsTop 35%
California: #106,790 of 386,348 inventorsTop 30%
Overall (All Time): #1,053,144 of 4,157,543Top 30%
5 Patents All Time

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDate
H1752 Single digital signal processor to record digital audio data on a Michael A. Zampini, Sean Stevens 1998-10-06
5691966 Recording eight digital audio channels on a single magneto optical disk Michael A. Zampini, Sean Stevens 1997-11-25
5493547 Recording eight digital audio channels on a single magneto optical disk Michael A. Zampini, Sean Stevens 1996-02-20
5315300 AES/EBU C block generator 1994-05-24
4209250 System for making multiple original holograms or copies of a hologram and method Randall P. James 1980-06-24