Granted Patent
Utility
US 4,813,828 · App. 07/125,976
Bottle boring milling tool
Inventors:
Hans W. Beck, Siegmar Nikstat
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Nov 27, 1987
Inventors
Hans W. Beck
Siegmar Nikstat
Assignee (at issue)
GTE Valenite 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.