Granted Patent
Utility
US 4,021,063 · App. 05/583,644
Surface bolt
Inventor:
James T. Porter
Patented Case
View Patent ↗
Granted: May 3, 1977
Filed: Jun 4, 1975
Inventor
James T. Porter
Assignee (at issue)
Leigh Products, 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.