Granted Patent
Utility
US 4,894,751 · App. 07/197,602
Printed circuit board for electronics
Inventor:
Ulrich Wehnelt
Patented Case
View Patent ↗
Granted: Jan 16, 1990
Filed: May 20, 1988
Inventor
Ulrich Wehnelt
Assignee (at issue)
Siemens Aktiengesellschaft
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.