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https://sealvo.com/keystone-portloc-72052886
USPTO Trademark Record
ABANDONEDKEYSTONE-PORTLOC
SN 72052886·Reg 674881·Filed Jun 04, 1958
Materials, not of metal, for building and construction; rigid pipes, not of metal, for building; asphalt, pitch, tar and bitumen; transportable buildings, not of metal; monuments, not of metal.
KEYSTONE-PORTLOC (Serial No. 72052886), Registration No. 674881, is a abandoned US trademark filed on Jun 04, 1958 by KEYSTONE INDUSTRIES, INC.. This trademark covers Class 019 (Non-metallic building materials).
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