Granted Patent
Utility
US 5,297,435 · App. 07/873,760
Residual stress measurement at fastener holes
Inventor:
John M. Papazian
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Apr 27, 1992
Inventor
John M. Papazian
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.