Assignee
PRE CORP
3 granted patents·73 citations·filing 1980–1980
Technology mixE21B3
Top patents by PatentIndex Score
3 records- 0159US4366650ASupport arrangement including base support means and elevatable support means to transport a drawworks and drilling mast supported thereon and for positioning at a drilling locationPRE CORP·Filed 1980·Granted Jan 4, 1983·29 cites·2 claims
- 0252US4305237ACompact sectionalized drilling mast, power arrangement and support means thereforPRE CORP·Filed 1980·Granted Dec 15, 1981·28 cites·4 claims
- 0338US4292772ATrailer mounted high floor drilling mast and substructure arrangementPRE CORP·Filed 1980·Granted Oct 6, 1981·16 cites·1 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →