For the Inventor, By the Inventor

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Aberdeen, United Kingdom

Astec Developments Limited

USPTO Granted Patents = 2

CIPO Patents = 1

Forward Citations = 62

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2 inventors (with patents filed for the assignee):

Neil Andrew Simpson (2 out of 4 patents)

Paul Raymond Coey (1 out of 1 patent)

Paul David Metcalfe (46 patents)

4. Neil Andrew Abercrombie Simpson (0 patent)

2 patents: Sort by Forward Citations

1. 5649603 - Downhole tools having circumferentially spaced rolling elements (1997-07-22),

2. 5101692 - Drill bit or corehead manufacturing process (1992-04-07),

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USPTO Data Jan 1 1976 - Jan 13 2026

2 Patents

#72 in Aberdeen

#6,382 in United Kingdom

Aberdeen, United Kingdom

Astec Developments Limited

Forward Citations = 62

2 inventors:

Neil Andrew Simpson (2 out of 4 patents)

Paul Raymond Coey (1 out of 1 patent)

Paul David Metcalfe (46 patents)

4. Neil Andrew Abercrombie Simpson (0 patent)

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