IP Library › Granted Patent US 5,445,513
Granted Patent Utility
US 5,445,513 · App. 08/179,333

Apparatus for enhancing concentration

Inventor: David L. Siggers
Patented Case View Patent ↗
Granted: Aug 29, 1995 Filed: Jan 10, 1994
Inventor
David L. Siggers
Assignee (at issue)
Hitech 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.

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 5,445,513
App. No.
08/179,333
Filed
1994-01-10
Granted
1995-08-29
Kind
A