Granted Patent
Utility
US 4,433,739 · App. 06/346,971
Mining drill
Inventor:
Vinod K. Sarin
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Feb 8, 1982
Inventor
Vinod K. Sarin
Assignee (at issue)
GTE Laboratories Incorporated
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.