Category:Ian Holden of Welwyn (GB)
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Ian Holden
Ian Holden from Welwyn (GB) has applied for patents in technology areas such as E21B41/00 with ABB Schweiz AG.
Patents
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Ian Holden from Welwyn (GB) has applied for patents in technology areas such as E21B41/00 with ABB Schweiz AG.
This category currently contains no pages or media.