Atlantic-Pacific (A-P) Radio Laboratories Co. Inc.; 648-650 Mission Street, San Francisco

Company formed to continue the tube manufacturing interests of the A-P Radio Supplies Co Inc

The Atlantic-Pacific Agencies Corp was anounced in the Journal of Electricity in their January 1924 issue. It was formed early to continue the activities of the A-P Sales Co. The totally new company - A-P Radio Laboratories Co was formed in March 1924 to further develop and manufacture radio tubes.

The application to file for incorporation of A-P Radio Laboratories Co was lodged on March 21st, 1924 by the attorney, W. F. Williamson, who had acted for the earlier Moorhead companies. The articles of incorporation were similar to those of the old A-P Radio Sales Co which were filed in March 1921. The new company had no association with any of the previous Moorhead companies. However the new company as able to use the inventory of the previous company and also was located at the old address - 648-650 Mission Street San Francisco. The only other thing that was the same was the types of tubes first made, being the A-P Solenoid and A-P "Two in One" tubes.          

Henry Huppert, who had originally designed these tubes in 1923, was re employed as a tube designer and worked mainly on the latter tube. He also still owned the patent rights to both these tubes. He worked on variations of the "Two in One" and at least three variations of it were designed and marketed. A more conventional type number series was also introduced for three of these new tubes.

The tubes were marketed by the Electric Appliance Company (address not known) and Baker-Smith Co of San Francisco, who appear to have been the only company to advertise the tubes.  

Tubes were only made for 13 months. The company ceased operations in July 1925 as it was no longer profitable make tubes and there was difficulty in getting filament product. Registration of the company was suspended on March 8th, 1932.

The QRS Music Company purchased the patents and inventory. QRS made their own design of tubes and used the Mission Street factory for this, before moving to new premises on the corner of 7th Street and Folsom Streets.