Granted Patent
Utility
US 5,954,346 · App. 08/939,825
Hydraulic chuck
Inventor:
Gordon Leonard McLaren
Patented Case
View Patent ↗
Granted: Sep 21, 1999
Filed: Sep 29, 1997
Inventor
Gordon Leonard McLaren
Assignee (at issue)
Boart Longyear Company
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.