Inventor · disambiguated record
Tosh Miyagishima
Also filed as: MIYAGISHIMA TOSH
6 granted patents·175 citations·filing 1975–1980
86Inventor score
Files withHYDRIL CO6
Top patents by PatentIndex Score
6 records- 0183US4305595AComposite sealHYDRIL CO·Filed 1980·Granted Dec 15, 1981·36 cites·5 claims
- 0274US4323256AFront packer seal for ram blowout preventerHYDRIL CO·Filed 1980·Granted Apr 6, 1982·55 cites·15 claims
- 0369US4294314AInside blowout preventer well toolHYDRIL CO·Filed 1979·Granted Oct 13, 1981·35 cites·4 claims
- 0468US4248264AInternal mud saver valveHYDRIL CO·Filed 1979·Granted Feb 3, 1981·24 cites·9 claims
- 0555US4064601AWell line strap connectionHYDRIL CO·Filed 1976·Granted Dec 27, 1977·19 cites·13 claims
- 0634US4036296ASubsurface well apparatusHYDRIL CO·Filed 1975·Granted Jul 19, 1977·6 cites·10 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →