2 trademarks were found for owners matching the name Derek John Olsen.
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1 TM: 520878
Desc: ENVIROBLOCK
Owner: Derek John Olsen
Class: 19
Status: Removed
Not renewed: Renewal fee not paid
2 TM: 520879
Desc: ENVIROWALL
Owner: Derek John Olsen
Class: 19
Status: Removed
Not renewed: Renewal fee not paid

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