logo

For the Inventor, By the Inventor

Proctorville, OH, United States of America

Earl Products, Inc.


USPTO Granted Patents = 2

% Expired Patents = 100.0

Forward Citations = 17

Loading Chart...
Loading Chart...

2 inventors (with patents filed for the assignee):

goldMedal Roy Lee Robertson, Jr (2 out of 8 patents)

silverMedal James Earl (1 out of 2 patents)


2 patents:

1. 6682268 - Method and apparatus for secondary roof support in an underground mine (2004-01-27),
2. 6637980 - Method and apparatus for re-tensioning a roof bolt in an underground mine (2003-10-28),
logo

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

2 Patents

#1 in Proctorville, OH

#3,641 in Ohio

#94,782 in US

Proctorville, OH (US)
Proctorville, OH, United States of America

Earl Products, Inc.

Forward Citations = 17

2 inventors:

goldMedal Roy Lee Robertson, Jr (2 out of 8 patents)

silverMedal James Earl (1 out of 2 patents)

Please report any incorrect information to [email protected]
Loading…