Granted Patent
Utility
US 4,529,066 · App. 06/372,613
Safety brake for mast-type crane
Inventor:
John E. Wieschel
Patented Case
View Patent ↗
Granted: Jul 16, 1985
Filed: Apr 28, 1982
Inventor
John E. Wieschel
Assignee (at issue)
Harnischfeger 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.