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73728077 - NO-TWIST
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Serial number 73728077
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Registration number 1548034
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Filing date May 12, 1988
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ELCO 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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73728045 - MICROLEAF
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Serial number 73728045
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Registration number 1546155
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Filing date May 12, 1988
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ELCO 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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72443153 - OPTISONICS
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Serial number 72443153
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Registration number 996396
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Filing date Dec 7, 1972
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ELCO CORPORATION
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9 - Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments