Granted Patent
Utility
US 4,254,541 · App. 05/957,706
Method of making clutch housing and pulley assembly
Inventor:
Richard C. St. John
Patented Case
View Patent ↗
Granted: Mar 10, 1981
Filed: Nov 6, 1978
Inventor
Richard C. St. John
Assignee (at issue)
Aspro, 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.