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Gyrosyn Trademarks
GYROSYN
Compass Repeaters, Compass Controlled Directional Gyroscopes, Earth Inductor Compasses, and Remote Reading Compasses
Cancelled
·
October 27, 1943
·
71464449
·
GYROSYNC
Sensors and computer software
Abandoned
·
October 25, 2020
·
90276241
·
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