Granted Patent
Utility
US 4,329,770 · App. 06/145,853
Automatic tool changer
Inventor:
Ervin J. Kielma
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: May 1, 1980
Inventor
Ervin J. Kielma
Assignee (at issue)
Kearney & Trecker Corporation
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.