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Spencer C. McGrath — 3 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Vancouver, WA: #608 of 1,812 inventorsTop 35%
Washington: #28,186 of 76,902 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Spencer C. McGrath has been granted 3 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in September 1999. Spencer C. McGrath ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Spencer C. McGrath in Vancouver, WA, US.

Patents per Year

Patents granted per year, 1980 to 1999Bar chart with a peak of 1 patents in 1980.peak 11980: 1 patents19801989: 1 patents19891999: 1 patents1999

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5954421 Fluorescent tube reflector and cover — 1999-09-21
4799134 Optical reflector system for fluorescent lighting fixtures David Pinch 1989-01-17
4198799 Apparatus for making exploded cellulosic fiber insulation — 1980-04-22

Frequent Collaborators

David Pinch1 shared

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Mark Vander Wal3
Chad M. Goltzman3
Sathish Kumar Thanganathan3
Debbie Maloyd3
Ethan Alexander Garrett3
Paul Sabatka3
Sergii Bomko3