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INTERNAT TELEPHONE DEV CO Inc
INTERNAT T
Active Patents
0
Total Holdings
2
Patent Holdings
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Patent No.
Title
Status
Filing Date
Grant Date
Claims
Actions
US2272997A
Landing beacon system
Expired / Lapsed
1939-10-11
1942-02-10
0
Details
US2244756A
Modulation system
Expired / Lapsed
1939-08-03
1941-06-10
0
Details