IP Library › Granted Patent US 4,607,978
Granted Patent Utility
US 4,607,978 · App. 06/521,731

Method and equipment for improving horizontal marking strips

Inventor: Ludwig Eigenmann
Patented Case View Patent ↗
Granted: Aug 26, 1986 Filed: Aug 9, 1983
Inventor
Ludwig Eigenmann

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 4,607,978
App. No.
06/521,731
Filed
1983-08-09
Granted
1986-08-26
Kind
A