Granted Patent
Utility
US 4,047,984 · App. 05/632,602
Corpuscular energy beam produced microasperities
Inventors:
William H. Belke, Joseph C. Hafele, Ernest W. Landen, Thomas J. Richards
Patented Case
View Patent ↗
Granted: Sep 13, 1977
Filed: Nov 17, 1975
Inventors
William H. Belke
Joseph C. Hafele
Ernest W. Landen
Thomas J. Richards
Assignee (at issue)
Caterpillar Tractor Co.
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.