Granted Patent
Utility
US 4,433,874 · App. 06/347,897
Crawler shoe having work-hardened pin-receiving hole
Inventor:
Raymond C. Melvin
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Feb 11, 1982
Inventor
Raymond C. Melvin
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.