Granted Patent
Utility
US 4,908,995 · App. 07/140,464
Rail grinding method and apparatus
Inventors:
Lawrence W. Dougherty, James R. Fendley, William H. Meyle, James L. Kraner
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Jan 4, 1988
Inventors
Lawrence W. Dougherty
James R. Fendley
William H. Meyle
James L. Kraner
Assignee (at issue)
Zenith Electronics LLC
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.