Granted Patent
Utility
US 4,343,372 · App. 06/161,701
Gage row structure of an earth boring drill bit
Inventor:
Donald L. Kinzer
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Jun 23, 1980
Inventor
Donald L. Kinzer
Assignee (at issue)
Hughes Tool Company LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.