For the Inventor, By the Inventor

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Aberdeen, United Kingdom

Tercel Oilfield Products UK Limited

USPTO Granted Patents = 3

CIPO Patents = 3

Forward Citations = 17

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3 inventors (with patents filed for the assignee):

Paul David Howlett (3 out of 37 patents)

James Bain (2 out of 3 patents)

Michael Wardley (1 out of 6 patents)

4. Michael Wardley (16 patents)

5. Graeme Marr (0 patent)

6. James Bain (0 patent)

3 patents: Sort by Forward Citations

1. 8511392 - Downhole swivel sub (2013-08-20),

2. 8342251 - Shoe for wellbore lining tubing (2013-01-01),

3. 8191639 - Downhole swivel sub (2012-06-05),

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USPTO Data Jan 1 1976 - Jan 6 2026

3 Patents

#59 in Aberdeen

#4,798 in United Kingdom

Aberdeen, United Kingdom

Tercel Oilfield Products UK Limited

Forward Citations = 17

3 inventors:

Paul David Howlett (3 out of 37 patents)

James Bain (2 out of 3 patents)

Michael Wardley (1 out of 6 patents)

4. Michael Wardley (16 patents)

5. Graeme Marr (0 patent)

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