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Argus Radio Tube Company in Providence, RI. Another unknown tube company from Rhode Island, the box in my collection is the only example I have seen. I did find a entry in the Official gazette of the United States Patent Office, June 1931 Vols 406 & 407 stating that CeCo Manufacturing Company was doing business as Argus Radio Tube Co., Providence, RI. Electrical vacuum tubes and valves, 313,646; June 2. There is also a listing for Argus Radio Tube Co. to see CeCo manufaturing company and a Trademark registration serial# 313,590 for Continental Tire Corporation doing business as Argus Radio Tube Co, Providence RI filed April 22 1931. Heinl Radio Business Letter August 20, 1931 Providence Journal August 30, 1931
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