2 trademarks were found for owners matching the name Leonard Douglas Zell.
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1 TM: 1037437
Desc: Wild Discovery Guide
Owner: Leonard Douglas Zell
Class: 41
Status: Registered: Renewal due
2 TM: 712408
Desc: ENVIROTEL
Owner: Leonard Douglas Zell
Class: 41, 42
Status: Lapsed: Not accepted