Robert Keller

City:

Chicago, Illinois

Country:

United States

Published Applications:

Last publication date:

2007-04-26

Top Assignees for applications by Robert Keller

The entities that hold a legal rights for patent applications filed by inventor Keller Robert:

Robert Keller from Chicago, US has applied for patents for these inventions. The list has both pending applications and granted patents:

Barrier movement operator having obstruction detection

System and method for automatically requiring secondary safety sensors

Method and apparatus using movable barrier zones

Barrier movement operator having obstruction detection

DC power backup

Barrier movement operator speed control

InventorID:

4398393 ⎘