C.R. Leutz Inc., Altoona, Pennsylvania.
Trade names Leutz, Plio, Pliodyne, Seven Seas, Silver Ghost, Transoceanic, Phantom.

In the November 1924 The Radio Trade Directory under the heading manufacturers of Vacuum Tube Sets on page 80, the Golden-Leutz, Inc. company was located at 476 Broadway in New York City, New York.

1921 Charles Roland Leutz and Claude Golden formed the EXPERIMENTERS' INFORMATION SERVICE (E.I.S.) in New York City.. They sold blueprints for superheterodynes that Leutz designed and tested in his laboratory.

1923 GOLDEN-LEUTZ was formed to sell kits and parts. The journal "Radio News" from October 1926 shows an advertisement with the name "GOLDEN-LEUTZ, Inc., Sixth & Washington Aves., Long Island City, N.Y. for "Most powerful in the world" Navy model "Universal transoceanic" - a receiver with 6 units under "Licensed under Hogan patent 1,014,002. There was a free catalog of 88 pages. The name Golden-Leutz was changed 1927 to C.R.LEUTZ, INC.

1924 Leutz, Golden, Golden-Leutz, and E.I.S. were sued by RCA under Fessenden and Armstrong patents. Testimony was taken in June 1924 and on July 21, 1924 Leutz's companies were enjoined from selling knockdown superhets (kits). They were only allowed to sell plans and parts.

NORDEN-HAUCK took over the sale of the banned goods. Located in Philadelphia they were obviously safe from RCA in New York.

The problem now is that the same models were sold under different names, and on top of that, the literature was not always dead true when models were attributed to manufacturers.

To avoid doublets in our records as far as possible we concentrate all the models of a.m. manufacturers and brand names under one single name LEUTZ.