{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.patentleaderboard.com/"}, {"@type": "ListItem", "position": 2, "name": "IBM", "item": "https://www.patentleaderboard.com/company/ibm"}, {"@type": "ListItem", "position": 3, "name": "Douglas E. Alexander", "item": "https://www.patentleaderboard.com/inventor/fl:do_ln:alexander-13"}]}
Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DA

Douglas E. Alexander — 7 Patents

IBM: 3 patents #26,335 of 70,183Top 40%
TCTennessee Mat Company: 2 patents #2 of 7Top 30%
USUnited States Steel: 1 patents #107 of 309Top 35%
Huntingdon, PA: #25 of 275 inventorsTop 10%
Pennsylvania: #11,887 of 74,527 inventorsTop 20%
Overall (All Time): #680,018 of 4,157,543Top 20%
7 Patents All Time
Douglas E. Alexander has been granted 7 US patents while listed as an inventor at IBM. The first was granted in 1982 and the most recent in August 2011. Douglas E. Alexander ranks #680,018 of 4,157,543 US inventors in our database (top 16.4%). Patent records list Douglas E. Alexander in Huntingdon, PA, US.

Patents per Year

Patents granted per year, 1982 to 2011Bar chart with a peak of 1 patents in 1982.peak 11982: 1 patents19821983: 1 patents19831985: 1 patents19851996: 1 patents19962006: 1 patents20062008: 1 patents20082011: 1 patents2011

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8006443 Interlocking modular floor tile Daniel C. Fuccella 2011-08-30
7322052 Dispensing apparatus for a toilet 2008-01-29
D520650 Section of interlocking modular floor tile Daniel C. Fuccella 2006-05-09
5516217 Document guiding ribbon cartridge Richard H. Harris, Jeff David Thomas 1996-05-14 $11,662,000
4553869 Buckling one way clutch James F. Holland, Herbert G. Leonard, Alvin Roy Reed 1985-11-19 $13,371,000
4401393 Printer ribbon cassette and feed mechanism Charles M. McCray 1983-08-30 $22,614,000
4354085 Pipe welder with improved seam spreader Kenneth E. George, Jr. 1982-10-12 $8,666,000