Inventor · disambiguated record
Robert J. Diehl
Also filed as: DIEHL ROBERT J
9 granted patents·325 citations·filing 1977–1990
91Inventor score
Top patents by PatentIndex Score
9 records- 0186US5050680AEnvironmental protection for subsea wellsCOOPER IND INC·Filed 1990·Granted Sep 24, 1991·69 cites·26 claims
- 0285US4570942ADual diameter valve stem packingJOY MFG CO·Filed 1985·Granted Feb 18, 1986·47 cites·5 claims
- 0382US4184504AWellhead valve removal and installation toolWKM WELLHEAD SYSTEMS·Filed 1977·Granted Jan 22, 1980·58 cites·19 claims
- 0471US4116419ALimited float seat construction for expanding gate valveACF IND INC·Filed 1977·Granted Sep 26, 1978·25 cites·6 claims
- 0568US4384730ASeal assemblyWKM WELLHEAD SYSTEMS·Filed 1981·Granted May 24, 1983·36 cites·3 claims
- 0668US4225325ASteam separator with variably sized rectangular inlet openingWKM WELLHEAD SYSTEMS·Filed 1979·Granted Sep 30, 1980·19 cites·13 claims
- 0763US4291768APacking assembly for wellheadsWKM WELLHEAD SYSTEMS·Filed 1980·Granted Sep 29, 1981·29 cites·8 claims
- 0860US4214778AHolddown mechanism for a tubing hanger in a wellheadWKM WELLHEAD SYSTEMS·Filed 1979·Granted Jul 29, 1980·23 cites·10 claims
- 0949US4372563APacking support for mounting a well casing packingWKM WELLHEAD SYSTEMS·Filed 1981·Granted Feb 8, 1983·19 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when Robert J. Diehl files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →