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1628230
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Information
Patent Grant
1628230
References
Source
Patent Number
1,628,230
Date Filed
Not available
Date Issued
Tuesday, May 10, 1927
97 years ago
CPC
B64C3/22 - Geodetic or other open-frame structures
B64D47/02 - Arrangements or adaptations of signal or lighting devices
US Classifications
244 - Aeronautics and astronautics
181 - Acoustics
381 - Electrical audio signal processing systems and devices
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