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73182245 - CRYSTAL-HET
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Serial number 73182245
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Registration number 1137248
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Filing date Aug 15, 1978
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PRINCETON APPLIED RESEARCH CORPORATION
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments
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72453496 - SYNCHRO-HET
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Serial number 72453496
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Registration number 993889
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Filing date Apr 4, 1973
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PRINCETON APPLIED RESEARCH CORPORATION
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments