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1921 Letter on Patents: Wireless Transmission of Energy Fog Phonograph Torpedo For Sale
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1921 Letter on Patents: Wireless Transmission of Energy Fog Phonograph Torpedo: $149.00
Fascinating papers found amongst a cache of documents belonging to Earl C. Hansen, a California inventor (Vacuphone hearing aid and early wireless radio technology).
This letter is signed O Adams (from other documents not included in this sale, we have learned this is Oliver P Adams) sent to Mr Brant (which we know is O F Brant of Title Insurance & Trust Company), discussing a number of patents in various Hansen trusts.
Cool piece!
Wear commensurate to age, including, possibly, chipping at edges, folds, and other minor issues. You get what you see :)
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1921 Letter on Patents: Wireless Transmission of Energy Fog Phonograph Torpedo $149.00
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