Granted Patent
Utility
US 5,435,672 · App. 08/284,819
Hole saw having plug ejection feature
Inventors:
Richard L. Hall, Donald M. Szymanski
Patented Case
View Patent ↗
Granted: Jul 25, 1995
Filed: Aug 5, 1994
Inventors
Richard L. Hall
Donald M. Szymanski
Assignee (at issue)
Vermont American Corporation
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.