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Philamon Trademarks
PHILAMON
ELECTRICALLY DRIVEN TUNING FORK APPARATUS USED, FOR EXAMPLE, AS FREQUENCY STANDARDS, FILTERS, AND OPTICAL MODULATORS
Expired
·
July 1, 1969
·
72331536
·
PHILAMON
ELECTRICAL TUNING FORK RESONATORS
Expired
·
March 7, 1955
·
71682977
·
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