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

David Allan Hellenga — 3 Patents

IBM: 3 patents #26,335 of 70,183Top 40%
Endwell, NY: #102 of 267 inventorsTop 40%
New York: #38,631 of 115,490 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
David Allan Hellenga has been granted 3 US patents while listed as an inventor at IBM. The first was granted in 1989 and the most recent in November 2001. David Allan Hellenga ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David Allan Hellenga in Endwell, NY, US.

Patents per Year

Patents granted per year, 1989 to 2001Bar chart with a peak of 1 patents in 1989.peak 11989: 1 patents19891999: 1 patents19992001: 1 patents2001

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6314462 Sub-entry point interface architecture for change management in a computer network Mary Kim Majikes, Thomas Mooney, Brian D. Valentine 2001-11-06 $29,245,000
5903757 Monitoring and handling of exception conditions in computer system Edward Gretz, Richard K. Hill 1999-05-11 $48,739,000
4862349 Method for extracting and/or replacing control system information in a computer operating system Dennis Foreman, Richard K. Hill 1989-08-29 $11,671,000