DH

David P. Hargraves

EE Emerson Electric: 6 patents #183 of 1,374Top 15%
📍 Webster Groves, MO: #50 of 205 inventorsTop 25%
🗺 Missouri: #3,599 of 23,789 inventorsTop 20%
Overall (All Time): #893,609 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
RE33775 Pulse controlled expansion valve for multiple evaporators and method of controlling same Joseph L. Behr 1991-12-24
4467613 Apparatus for and method of automatically adjusting the superheat setting of a thermostatic expansion valve Joseph L. Behr 1984-08-28
4459819 Pulse controlled expansion valve and method 1984-07-17
4340202 Four way valve Jude A. Pauli, Steven E. Williams 1982-07-20
4268006 Modulating diaphragm valve Bernard L. Kunz 1981-05-19
4202373 Four way valve Jude A. Pauli, Steven E. Williams 1980-05-13