Granted Patent
Utility
US 6,164,898 · App. 09/010,049
Manhole cover removal apparatus and method
Inventor:
Richard J. Taylor
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Jan 21, 1998
Inventor
Richard J. Taylor
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.