Granted Patent
Utility
US 4,462,053 · App. 06/280,137
Method for controlling a disc head
Inventors:
Francis Lum, Bruce D. Graham, Samuel N. Irwin, Juan F. Velazquez
Patented Case
View Patent ↗
Granted: Jul 24, 1984
Filed: Jul 2, 1981
Inventors
Francis Lum
Bruce D. Graham
Samuel N. Irwin
Juan F. Velazquez
Assignee (at issue)
Irwin International, 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.