Granted Patent
Utility
US 4,639,997 · App. 06/756,419
Method of making a device for monitoring fatigue life
Inventor:
Maurice A. Brull
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Jul 18, 1985
Inventor
Maurice A. Brull
Assignee (at issue)
Tensiodyne Scientific, 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.