Granted Patent
Utility
US 4,830,001 · App. 07/084,233
Assembly sleeve for cranial drill
Inventor:
Richard L. Walus
Patented Case
View Patent ↗
Granted: May 16, 1989
Filed: Aug 10, 1987
Inventor
Richard L. Walus
Assignee (at issue)
Codman & Shurtleff, Inc.
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.