Gregory L. Hern

City:

Huffman, Texas

Country:

United States

Published Applications:

Last publication date:

2008-08-14

Top Assignees for applications by Gregory L. Hern

The entities that hold a legal rights for patent applications filed by inventor Hern Gregory L.:

Gregory L. Hern from Huffman, US has applied for patents for these inventions. The list has both pending applications and granted patents:

Single cycle dart operated circulation sub

Wellbore cleanup tool

Annular flow shifting device

Shear type circulation valve and swivel with open port reciprocating feature

Whipstock kick off radius

InventorID:

4109524 ⎘