3 patents
Utility
Check valve
26 Jul 22
A check valve has an inlet end, a transition part and an outlet end, with a pair of vertically orientated lips.
Calvin C. Hayes, Michael W. Lassas, James M. Gannatal, Heli Tusharkumat Trivedi
Filed: 22 Mar 21
Utility
Check valve
11 Jan 22
An asymmetrical check valve has an inlet end, a transition part and an outlet end, with a pair of vertically orientated lips.
James M. Gannatal, Michael W. Lassas, Calvin C. Hayes
Filed: 30 Apr 19
Utility
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6 Nov 19
An asymmetrical check valve has an inlet end, a transition part and an outlet end, with a pair of vertically orientated lips.
James M. Gannatal, Michael W. Lassas, Calvin C. Hayes
Filed: 29 Apr 19
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