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

Douglas A. Buchanan

IBM: 27 patents #3,831 of 70,183Top 6%
UMUniversity Of Manitoba: 1 patents #101 of 312Top 35%
Cross Lake, CA: #2 of 191 inventorsTop 2%
Overall (All Time): #138,732 of 4,157,543Top 4%
28 Patents All Time

Issued Patents All Time

Showing 26–28 of 28 patents

Patent #TitleCo-InventorsDate
5569501 Diamond-like carbon films from a hydrocarbon helium plasma Fredric D. Bailey, Alessandro C. Callegari, Howard M. Clearfield, Fuad E. Doany, Donis Flagello +8 more 1996-10-29
5470661 Diamond-like carbon films from a hydrocarbon helium plasma Fredric D. Bailey, Alessandro C. Callegari, Howard M. Clearfield, Fuad E. Doany, Donis Flagello +8 more 1995-11-28
4859253 Method for passivating a compound semiconductor surface and device having improved semiconductor-insulator interface Alessandro C. Callegari, Peter D. Hob, Dianne L. Lacey 1989-08-22