Granted Patent
Utility
US 4,647,988 · App. 06/707,715
Magnetic write circuit
Inventor:
Shigeru Takehara
Patented Case
View Patent ↗
Granted: Mar 3, 1987
Filed: Mar 4, 1985
Inventor
Shigeru Takehara
Assignee (at issue)
Motorola, 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.