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Stephen W. Bartholomew
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Simsbury, CT, US
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Patents Grants
last 30 patents
Information
Patent Grant
Non-electric initiator system
Patent number
11,892,277
Issue date
Feb 6, 2024
Detotec North America
Timothy O'Brien
C06 - EXPLOSIVES MATCHES
Information
Patent Grant
Signal encrypted digital detonator system
Patent number
9,879,964
Issue date
Jan 30, 2018
Ensign-Bickford Aerospace & Defense Company
Marc A. Morris
F42 - AMMUNITION BLASTING
Information
Patent Grant
Signal encrypted digital detonator system
Patent number
9,568,294
Issue date
Feb 14, 2017
Ensign-Bickford Aerospace & Defense Company
Marc A. Morris
F42 - AMMUNITION BLASTING
Information
Patent Grant
Redundant signal transmission system and development method
Patent number
7,162,957
Issue date
Jan 16, 2007
Shock Tube Systems, Inc.
John O'Brien
F42 - AMMUNITION BLASTING
Information
Patent Grant
Redundant signal transmission system and deployment means
Patent number
7,086,335
Issue date
Aug 8, 2006
Shock Tube Systems, Inc.
John P. O'Brien
F42 - AMMUNITION BLASTING
Information
Patent Grant
In-line initiator and firing device assembly
Patent number
6,272,996
Issue date
Aug 14, 2001
Shock Tube Systems, Inc.
John P. O'Brien
C06 - EXPLOSIVES MATCHES
Patents Applications
last 30 patents
Information
Patent Application
NON-ELECTRIC INITIATOR SYSTEM
Publication number
20220049936
Publication date
Feb 17, 2022
Detotec North America
Timothy O'Brien
F42 - AMMUNITION BLASTING
Information
Patent Application
SIGNAL ENCRYPTED DIGITAL DETONATOR SYSTEM
Publication number
20160223310
Publication date
Aug 4, 2016
ENSIGN-BICKFORD AEROSPACE & DEFENSE COMPANY
Marc A. Morris
F42 - AMMUNITION BLASTING
Information
Patent Application
Redundant signal transmission system and development method
Publication number
20060185505
Publication date
Aug 24, 2006
Shock Tube Systems, Inc.
John P. O'Brien
F42 - AMMUNITION BLASTING
Information
Patent Application
Redundant signal transmission system and deployment means
Publication number
20050016370
Publication date
Jan 27, 2005
John P. O'Brien
F42 - AMMUNITION BLASTING