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History of the manufacturer  

Pacific Heterograph Co.; San Francisco (CA)

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Name: Pacific Heterograph Co.; San Francisco (CA)    (USA)  
Abbreviation: pacifichet
Products: Model types

Pacific Heterograph Co.; 433 Call Building, San Francisco (1926).

Communication- & telegraph services.

A known supplier for the company was:

Stone-Ryals Electric Co.; 470 Natoma Street, San Francisco, California; also known as Stone-Ryals Electric and Manufacturing Co.

Stone-Ryals's business was making welding equipment, making and installing crane and hoisting equipment, and doing electrical wiring and other electrical contracting work. A telegraph machine is known which was built for the Pacific Heterograph Co.


This manufacturer was suggested by Wolfgang Scheida.

Some models:
Country Year Name 1st Tube Notes
USA  26 The Heterograph   For teaching Commercial Wireless Telegraphy. Manufactured by Stone-Ryals Electric Co.