Earphone Bidirectional Pressure Port
Copyright © Targeted News Service 2024
2024-11-12
ALEXANDRIA, Virginia, Nov. 12 -- MAGNATONE HEARING AID CORPORATION, Casselberry, Florida has been assigned a patent (No. US 12143767 B1, initially filed Jan. 23, 2024) developed by Don Campbell, Casselberry, Florida, for "Earphone bidirectional pressure port." . . .