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John Hoffman — 3 Patents

STStress-Tek: 2 patents #3 of 11Top 30%
Calabasas, CA: #1,154 of 4,119 inventorsTop 30%
California: #150,760 of 386,348 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
John Hoffman has been granted 3 US patents while listed as an inventor at Stress-Tek. The first was granted in 1989 and the most recent in July 2009. John Hoffman ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list John Hoffman in Calabasas, CA, US.

Patents per Year

Patents granted per year, 1989 to 2009Bar chart with a peak of 1 patents in 1989.peak 11989: 1 patents19892006: 1 patents20062009: 1 patents2009

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
7561034 Vehicle load warning system Keith Reichow, Pat Ryan, Bill Zimmerman, Lee Schwartz 2009-07-14
7113081 Vehicle load warning system Keith Reichow, Pat Ryan, Bill Zimmerman, Lee Schwartz 2006-09-26
4880266 Vehicle ash tray Bruce Jay GREENBAUM 1989-11-14

Frequent Collaborators

Lee Schwartz2 shared
Pat Ryan2 shared
Keith Reichow2 shared
Bill Zimmerman2 shared
Bruce Jay GREENBAUM1 shared

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Debbie Maloyd3
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Paul Sabatka3
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