David E. Grant — 5 Patents at Envirotech

David E. Grant has been granted 5 US patents while listed as an inventor at Envirotech. The first was granted in 1984 and the most recent in October 2022. David E. Grant ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list David E. Grant in Newcastle upon Tyne, ME, GB.

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #	Title	Co-Inventors	Date
11457570	Planter block	—	2022-10-04
10995491	Planter block	—	2021-05-04
9694673	Tank assembly with retaining ring	Carson Chandler Beauchaine, Jonathan P. Sussman	2017-07-04
8734082	Implement support device	—	2014-05-27
4439938	Coupling mechanism	—	1984-04-03

David E. Grant — 5 Patents

Issued Patents All Time

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