Granted Patent
Utility
US 4,638,532 · App. 06/724,054
Mechanical fastening system
Inventors:
James H. C. Yang, Walter Tomaszewski
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Apr 18, 1985
Inventors
James H. C. Yang
Walter Tomaszewski
Assignee (at issue)
The Firestone Tire & Rubber 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.