Granted Patent
Utility
US 4,473,738 · App. 06/308,300
Method and apparatus for hot forming a polygonal head on a snap tie rod
Inventors:
Charles Wolfe, Ivan C. Eltzroth
Patented Case
View Patent ↗
Granted: Sep 25, 1984
Filed: Oct 5, 1981
Inventors
Charles Wolfe
Ivan C. Eltzroth
Assignee (at issue)
DAYTON SUPERIOR CORPORATION
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.