Granted Patent
Utility
US 3,987,665 · App. 05/606,820
Non-destructive test method for assessing textile material degradation
Inventor:
John Hansen
Patented Case
View Patent ↗
Granted: Oct 26, 1976
Filed: Aug 22, 1975
Inventor
John Hansen
Assignee (at issue)
The United States of America as represented by the Secretary of the Army
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.