Granted Patent
Utility
US 5,491,553 · App. 08/252,021
Triple laser rotary kiln alignment system
Inventor:
Walter M. Gebhart
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Jun 1, 1994
Inventor
Walter M. Gebhart
Assignee (at issue)
Phillips Kiln Service Company of Canada, Ltd.
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.