Patent Assignment
Reel/Frame 021936/0872
Assignment of Assignor's Interest
Recorded: 2008-12-09
Pages: 8
Assignor
KEYSTONE DRILL SERVICES, INC.
Executed: 2008-11-06
Assignee
KEYSTONE AIR & DRILL SUPPLY CO.
184 ALISA STREET, SOMERSET, PENNSYLVANIA, 15501
Covered Properties
(2)
Multi-Sectional Percussive Drill Bit Assembly
Multi-Sectional Percussive Drill Bit Assembly
Related Assignments
(6)
Other recorded transfers of the patents in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 7, 2006
From: WALKER, THOMAS A.; MEANS, STEPHEN R.; SMITH, RICHARD
To: KEYSTONE DRILL SERVICES, INC.
Reel/Frame 017735/0386 →
Assignment of Assignor's Interest
Nov 27, 2006
From: WALKER, THOMAS A.; MEANS, STEPHEN R.; SMITH, RICHARD K., JR.
To: KEYSTONE DRILL SERVICES, INC.
Reel/Frame 018553/0382 →
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
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 →