IP Library › Granted Patent US 4,759,239
Granted Patent Utility
US 4,759,239 · App. 07/022,619

Wrench assembly for a top drive sub

Inventors: William R. Hamilton, Karl SCHULZ
Patented Case View Patent ↗
Granted: Jul 26, 1988 Filed: Mar 3, 1987
Inventors
William R. Hamilton
Karl SCHULZ
Assignee (at issue)
Hughes Tool Company LLC

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Quick Facts
Patent No.
US 4,759,239
App. No.
07/022,619
Filed
1987-03-03
Granted
1988-07-26
Kind
A