Marshall; Alan J.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Marshall; Alan J..The latest application filed is for "percussion hammer bit".

Company Profile

0.9.10

Marshall; Alan J. - Lost Creek WV
Marshall; Alan J - Lost Creek WV

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Percussion drilling assembly and hammer bit with gage and outer row reinforcement Grant 9,605,485 - Swadi , et al. March 28, 2	2017-03-28
Percussion Hammer Bit App 20160153236 - MARSHALL; Alan J.	2016-06-02
Percussion drilling assembly and hammer bit with gage and outer row reinforcement Grant 8,763,729 - Swadi , et al. July 1, 2	2014-07-01
Percussion Drilling Assembly And Hammer Bit With Gage And Outer Row Reinforcement App 20130175096 - Swadi; Shantanu ; et al.	2013-07-11
Percussion drilling assembly and hammer bit with gage and outer row reinforcement Grant 8,387,725 - Swadi , et al. March 5, 2	2013-03-05
Percussion drilling assembly with annular locking member Grant 8,312,613 - Marshall November 20, 2	2012-11-20
Percussion hammer bit with a driver sub including a guide sleeve portion Grant 8,312,944 - Marshall , et al. November 20, 2	2012-11-20
Percussion drilling assembly having erosion retarding casing Grant 8,061,450 - Marshall November 22, 2	2011-11-22
Percussion Drilling Assembly With Annular Locking Member App 20110258836 - MARSHALL; ALAN J.	2011-10-27
Percussion drilling assembly with annular locking member Grant 7,997,346 - Marshall August 16, 2	2011-08-16
Percussion Hammer Bit With a Driver Sub Including a Guide Sleeve Portion App 20100187016 - Marshall; Alan J. ; et al.	2010-07-29
Percussion Drilling Assembly With Annular Locking Member App 20100139979 - Marshall; Alan J.	2010-06-10
Percussion Drilling Assembly Having Erosion Retarding Casing App 20100044111 - Marshall; Alan J.	2010-02-25
Percussion Drilling Assembly and Hammer Bit with Gage and Outer Row Reinforcement App 20090255735 - Swadi; Shantanu ; et al.	2009-10-15
Percussion bit drill drive collar with retention mechanism and method of assembling Grant 7,428,938 - Marshall September 30, 2	2008-09-30
Percussion bit drill drive collar with retention mechanism App 20070261885 - Marshall; Alan J.	2007-11-15
Percussion drill bit with V-shaped splines App 20070137895 - Marshall; Alan J. ; et al.	2007-06-21

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