IP Library Granted Patent US 4,833,667
Granted Patent Utility
US 4,833,667 · App. 07/133,947

Spindle motor assembly for low acoustic noise environments

Inventors: Joseph T. Castagna, Joseph C. Cardona
Patented Case View Patent ↗
Granted: May 23, 1989 Filed: Dec 17, 1987
Inventors
Joseph T. Castagna
Joseph C. Cardona
Assignee (at issue)
Priam 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,833,667
App. No.
07/133,947
Filed
1987-12-17
Granted
1989-05-23
Kind
A