Granted Patent
Utility
US 4,715,806 · App. 06/799,337
Apparatus for the punching and removing of the sprue in an injection molding tool
Inventors:
Ernst Ehrler, Martin Eichlseder, Edmund Theiss
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Nov 18, 1985
Inventors
Ernst Ehrler
Martin Eichlseder
Edmund Theiss
Assignee (at issue)
Krauss-Mafei AG
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.