Granted Patent
Utility
US 4,828,045 · App. 07/118,682
Dozer blade visual tilt indicator
Inventors:
Rudolf Horsch, Claude M. Frisbee, Ronald H. Werner
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: Nov 9, 1987
Inventors
Rudolf Horsch
Claude M. Frisbee
Ronald H. Werner
Assignee (at issue)
J. I. Case Company
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.