Granted Patent
Utility
US 5,615,784 · App. 08/315,195
Crane counterweight installation and removal apparatus
Inventors:
David J. Pech, Larry Schweigl
Patented Case
View Patent ↗
Granted: Apr 1, 1997
Filed: Sep 29, 1994
Inventors
David J. Pech
Larry Schweigl
Assignee (at issue)
The Manitowoc Company, Inc.
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.