Granted Patent
Utility
US 4,343,101 · App. 06/250,747
Scraper bowl structure
Inventors:
William H. Klekamp, Philip H. Tullis
Patented Case
View Patent ↗
Granted: Aug 10, 1982
Filed: Sep 12, 1980
Inventors
William H. Klekamp
Philip H. Tullis
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.