Granted Patent
Utility
US 4,323,409 · App. 06/125,499
Apparatus and method for forming dielectrically sealed laminar sheet materials
Inventor:
Rudolph Alt
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Feb 28, 1980
Inventor
Rudolph Alt
Assignee (at issue)
The General Tire & Rubber 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.