Granted Patent
Utility
US 4,238,258 · App. 06/089,121
Elongate material spreading and tacking apparatus and method
Inventors:
Michael H. Kraps, Samuel B. Stevens
Patented Case
View Patent ↗
Granted: Dec 9, 1980
Filed: Jun 26, 1979
Inventors
Michael H. Kraps
Samuel B. Stevens
Assignee (at issue)
Caterpillar Tractor Co.
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.