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

Allan L. Ham — 3 Patents

Pfizer: 3 patents #1,614 of 5,153Top 35%
Broadstairs, GB: #9 of 29 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Allan L. Ham has been granted 3 US patents while listed as an inventor at Pfizer. The first was granted in 1980 and the most recent in January 1983. Allan L. Ham ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Allan L. Ham in Broadstairs, GB.

Patents per Year

Patents granted per year, 1980 to 1983Bar chart with a peak of 1 patents in 1980.peak 11980: 1 patents19801981: 1 patents19811983: 1 patents1983

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4370328 Cardiac stimulant 1-(3- or 4-substituted piperidino)phthalazines Simon F. Campbell, John C. Danilewicz, John K. Stubbs 1983-01-25 $15,345,000
4289772 1-Piperidinophthalazines as cardiac stimulants Simon F. Campbell, John C. Danilewicz, Anthony G. Evans 1981-09-15 $4,365,000
4188391 4-[4-(Substituted)piperidino]quinazoline cardiac stimulants Simon F. Campbell, John C. Danilewicz, John K. Stubbs 1980-02-12 $3,178,000