ALEXANDRIA, Va., March 12 -- United States Patent no. D1,066,603, issued on March 11, was assigned to MANN TEKNIK AB (Mariestad, Sweden).
"Packing ring for tubes and pipes" was invented by Marcus Backstrom (Mariestad, Sweden), Gerhard Kopplin (Lyrestad, Sweden) and Lars Lindell (Mariestad, Sweden).
The patent was filed on Dec. 22, 2021, under Application No. D/820,528.
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