Granted Patent
Utility
US 4,227,927 · App. 05/893,276
Powder metallurgy
Inventors:
Herbert L. Black, Mark Somerville, Jerome Schwertz
Patented Case
View Patent ↗
Granted: Oct 14, 1980
Filed: Apr 5, 1978
Inventors
Herbert L. Black
Mark Somerville
Jerome Schwertz
Assignee (at issue)
Cyclops Corporation, Universal-Cyclops Specialty Steel Division
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.