John D. O'Brien — 4 Patents at Unknown

John D. O'Brien has been granted 4 US patents while listed as an inventor at Unknown. The first was granted in 1982 and the most recent in July 2022. John D. O'Brien ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list John D. O'Brien in Ware, MA, US.

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
D957086	Sandwich	Dillon Ceglio, Brett Perrotta	2022-07-12
4653255	Line reel mower	Stephen M. Baker, Douglas G. Davidson	1987-03-31
D268010	Display card	—	1983-02-22
D266630	Bow template	—	1982-10-26

John D. O'Brien — 4 Patents

Issued Patents All Time

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