USPTO trademark record

DUO-PAK

Dead mark · Owner A-T-O INC. · Classes 10

Mark details

Owner: A-T-O INC.
Serial number: 73149455
Registration number: 1100646
Status: EXPIRED (dead)
Classes: 10 (Medical devices)
Filed: 1977-11-21
Registered: 1978-08-29
Goods / services: PORTABLE SOLID STATE OXYGEN GENERATORS

Register data indexed 2026-11-07. Bulk records trail live filings — check the official USPTO search for the latest status before filing.

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