Inventor · disambiguated record

John J. Grisaffi

Also filed as: GRISAFFI JOHN J

1 granted patent·37 citations·filing 1982–1982

46Inventor score

Technology areasE21B

Files withLAWRENCE LARRY K1

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1 record

0158US4478015ACable sling arrangement for pivoting a drilling mast and drawworks elevator to a raised or reclined position in relation to a substructure support and method of cable sling string upLAWRENCE LARRY K·Filed 1982·Granted Oct 23, 1984·37 cites·15 claims

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