Granted Patent
Utility
US 5,549,809 · App. 08/289,253
Method for hardening metallic elements
Inventors:
Eric L. P. Barreau, Yves C. L. A. Honnorat, Robert L. Martinou, Catherine Richin
Patented Case
View Patent ↗
Granted: Aug 27, 1996
Filed: Aug 11, 1994
Inventors
Eric L. P. Barreau
Yves C. L. A. Honnorat
Robert L. Martinou
Catherine Richin
Assignee (at issue)
Societe Nationale d'Etude et de Construction de Moteurs d'Aviation - S.N.E.C.M.A
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.