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

Frank E. Castle — 3 Patents

IBM: 3 patents #26,335 of 70,183Top 40%
Winchester, GB: #267 of 924 inventorsTop 30%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Frank E. Castle has been granted 3 US patents while listed as an inventor at IBM. The first was granted in 1988 and the most recent in June 1993. Frank E. Castle ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Frank E. Castle in Winchester, GB.

Patents per Year

Patents granted per year, 1988 to 1993Bar chart with a peak of 1 patents in 1988.peak 11988: 1 patents19881992: 1 patents19921993: 1 patents1993

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5224020 Electronic apparatus having modular front and back functional units and electrical distribution unit including a fan therebetween Ian Golledge, David J. Gray, Richard O'Regan 1993-06-29 $12,051,000
5168424 Multi unit electrical apparatus with dual inlet fan positioned opposite unit bays Ivor W. Bolton, David S. Gaunt 1992-12-01 $10,188,000
4743995 Disk file with in-hub motor Colin P. Hatchett, Michael R. Hatchett, John S. Heath 1988-05-10 $24,528,000