William P. Ketcham — 2 Patents at Unknown

William P. Ketcham has been granted 2 US patents while listed as an inventor at Unknown. The first was granted in 1984 and the most recent in June 1985. William P. Ketcham ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list William P. Ketcham in Cos Cob, CT, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
D279173	Countdown timer	—	1985-06-11
4451158	Countdown timer	Stephen Selwyn	1984-05-29

William P. Ketcham — 2 Patents

Issued Patents All Time

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