Granted Patent
Utility
US 6,012,218 · App. 09/042,631
Process for producing thin film magnetic heads
Inventors:
Yoshiaki Shimizu, Fumio Tatezono, Naoto Matono, Takashi Ogura, Hiroyuki Okuda, Katsumi Umeda
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Mar 17, 1998
Inventors
Yoshiaki Shimizu
Fumio Tatezono
Naoto Matono
Takashi Ogura
Hiroyuki Okuda
Katsumi Umeda
Assignee (at issue)
SANYO ELECTRIC 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.