Patent Assignment
Reel/Frame 018553/0382
Assignment of Assignor's Interest
Recorded: 2006-11-27
Pages: 6
Assignors
WALKER, THOMAS A.
Executed: 2006-11-17
MEANS, STEPHEN R.
Executed: 2006-11-21
SMITH, RICHARD K., JR.
Executed: 2006-11-22
Assignee
KEYSTONE DRILL SERVICES, INC.
184 ALISA STREET, SOMERSET, PENNSYLVANIA, 15501
Covered Property
(1)
Multi-Sectional Percussive Drill Bit Assembly
Related Assignments
(5)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
May 27, 2008
From: KEYSTONE DRILL SERVICES, INC.
To: KEYSTONE DRILL SERVICES, LLC
Reel/Frame 021005/0039 →
Security Agreement
May 27, 2008
From: KEYSTONE DRILL SERVICES, LLC
To: THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, AS COLLATERAL AGENT
Reel/Frame 021005/0193 →
Assignment of Assignor's Interest
Dec 9, 2008
From: KEYSTONE DRILL SERVICES, INC.
To: KEYSTONE AIR & DRILL SUPPLY CO.
Reel/Frame 021936/0872 →
Assignment of Assignor's Interest
Oct 22, 2009
From: KEYSTONE DRILL SERVICES, LLC
To: KEYSTONE AIR & DRILL SUPPLY CO.
Reel/Frame 023401/0963 →
Release of Security Interest
Jul 31, 2015
From: THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, AS COLLATERAL AGENT
To: KEYSTONE DRILL SERVICES, LLC
Reel/Frame 036230/0595 →