Granted Patent
Utility
US 5,200,975 · App. 07/799,357
Furnace for viscoelasticity measuring device with concentric gas cooling shield
Inventor:
Hidetaka Kato
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Nov 27, 1991
Inventor
Hidetaka Kato
Assignee (at issue)
SEIKO INSTRUMENTS INC.
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.