Joseph L. Frederick — 2 Patents at Hydril

Joseph L. Frederick has been granted 2 US patents while listed as an inventor at Hydril. The first was granted in 1994 and the most recent in April 1995. Joseph L. Frederick ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Joseph L. Frederick in Cleveland, TX, US.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5407172	Position instrumented blowout preventer	Kenneth D. Young, Kenneth W. Colvin	1995-04-18
5320325	Position instrumented blowout preventer	Kenneth D. Young, Kenneth W. Colvin	1994-06-14

Joseph L. Frederick — 2 Patents

Issued Patents All Time

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