Granted Patent
Utility
US 4,056,912 · App. 05/751,536
Method for releasing tilt-up panel hoisting member
Inventors:
James E. Case, Richard L. Ruppert
Patented Case
View Patent ↗
Granted: Nov 8, 1977
Filed: Dec 16, 1976
Inventors
James E. Case
Richard L. Ruppert
Assignee (at issue)
The Dayton Sure Grip & Shore 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.