Granted Patent
Utility
US 4,507,993 · App. 06/478,405
Machine tool with two speed turret indexing
Inventors:
Martin L. Silverman, Donald P. Shook
Patented Case
View Patent ↗
Granted: Apr 2, 1985
Filed: Mar 24, 1983
Inventors
Martin L. Silverman
Donald P. Shook
Assignee (at issue)
Warner & Swasey
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.