For the Inventor, By the Inventor

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Hampshire, United Kingdom

Well Ballistics, Ltd.

USPTO Granted Patents = 2

% Expired Patents = 100.0

CIPO Patents = 1

Forward Citations = 51

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3 inventors (with patents filed for the assignee):

James Marshall Barker (2 out of 48 patents)

Michael C Rogers (2 out of 2 patents)

Duncan MacNiven (2 out of 2 patents)

4. Michael C Rogers (0 patent)

5. Duncan A Macniven (0 patent)

2 patents: Sort by Forward Citations

1. 7303017 - Perforating gun assembly and method for creating perforation cavities (2007-12-04),

2. 7172023 - Perforating gun assembly and method for enhancing perforation depth (2007-02-06),

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USPTO Data Jan 1 1976 - Sep 22 2026

2 Patents

#55 in Hampshire

#6,506 in United Kingdom

Hampshire, United Kingdom

Well Ballistics, Ltd.

Forward Citations = 51

3 inventors:

James Marshall Barker (2 out of 48 patents)

Michael C Rogers (2 out of 2 patents)

Duncan MacNiven (2 out of 2 patents)

4. Michael C Rogers (0 patent)

5. Duncan A Macniven (0 patent)

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