File:Hettinger's Aerial Conductors for Wireless Signaling US1309031A.jpg
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[edit]DescriptionHettinger's Aerial Conductors for Wireless Signaling US1309031A.jpg | Hettinger's Aerial Conductors for Wireless Signaling | |||||||
Date | ||||||||
Source | Hettinger's Aerial Conductors for Wireless Signaling US1309031 | |||||||
Author | J. Hettinger | |||||||
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current | 19:39, 8 July 2019 | 564 × 828 (47 KB) | Thats Just Great (talk | contribs) | {{Information |description=Hettinger's Aerial Conductors for Wireless Signaling |date=July 8, 1919 |source=[https://patents.google.com/patent/US1309031 Hettinger's Aerial Conductors for Wireless Signaling US1309031] |author= J. Hettinger |permission={{PD-USGov}} |other versions= }} Category:U.S. Patent drawings |
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