Granted Patent
Utility
US 5,569,877 · App. 08/418,493
Sewn material and method for shielding against electromagnetic waves
Inventor:
Hideo Yumi
Patented Case
View Patent ↗
Granted: Oct 29, 1996
Filed: Apr 7, 1995
Inventor
Hideo Yumi
Assignee (at issue)
KITAGAWA INDUSTRIES CO., LTD.
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.