USPTO trademark record

DIF-RING

Live registered mark · Owner Duoline Technologies, Inc. · Classes 17

Mark details

Owner: Duoline Technologies, Inc.
Serial number: 88301620
Registration number: 6707719
Status: REGISTERED
Classes: 17 (Rubber / plastics)
Filed: 2019-02-14
Registered: 2022-04-19
Goods / services: Non-metal corrosion barrier rings and collars for use in connecting segments of oil field tubing

Register data as of 2026-11-08. Records can trail live filings — check the official USPTO search for the latest status before filing.

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