Granted Patent
Utility
US 5,365,392 · App. 08/008,672
Magnetic head with shaped winding grooves
Inventors:
Heikichi Sato, Hitoshi Kimura, Osamu Onodera
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Jan 22, 1993
Inventors
Heikichi Sato
Hitoshi Kimura
Osamu Onodera
Assignee (at issue)
SONY GROUP 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.