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History of the manufacturer  

Dictograph Products Co. International (General Acoustic; Acousticon; Turner) ; New York

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Name: Dictograph Products Co. International (General Acoustic; Acousticon; Turner) ; New York    (USA)  
Abbreviation: dictograph
Products: Model types

General Acoustic Co.; 1313 Candler Bldg., N.Y.
Dictograph Products Co., Inc.; 4th St., New York City, N.Y.
Dictograph Products, Inc.; 95-25 149th St., Jamaica 35, N.Y.
Dictograph Sales Corp.; 95-25 149th St., Jamaica, N.Y.
Guardian Industries, Inc.; 26 Columbia Turnpike, Florham Park, NJ

UK: Dictograph Telehones Limited; Aurelia Road, Croydon, Surrey

Old trademark Dictograph registered in 1912 (filed 1911, used 1906).
Stylized logo trademark registered in 1959 (filed 1958, used 1946).
Acousticon International, Division of Dictograph Products Inc.

Founded: 1906
Production: 1922 -

The company was founded (possibly already in 1902) as General Acoustic Co., with Kelly Monroe Turner as President.
In 1920, the company was renamed to Dictograph Products Co. and appeared as successor of General Acoustic. At the same time, subsidiaries were founded in Europe (see above) that operated well into the 1960s.
After WWII, the company underwent a number of mergers and change of names (Fire Detective Inc., Dictograph Franchise Corp., The Perl Organization, Inc, Acousticon Systems Corp. - to name a few).

The Dictograph trademark of 1959 was last renewed in 1979 and is cancelled as of 2000.

General Acoustic produced Acousticon hearing devices and the Dictograph-Turner Telephone System. From these origins, they developed further Dictograph branded products such as the Motor Dictograph and the Detective Dictograph.
With the success of Dictograph as a brand name, General Acoustic changed its name to Dictograph Products Co. in 1920. There were numerous telephone and intercommunication systems built, as well as a fire alarm system (date unknown).

They first entered the radio market with radio headsets and a horn speaker in 1922. The portfolio was extended over the years (Dictogrand horn speakers, roll speakers).

Hearing aids and communication systems were continued throughout the 1930s and 1940s. In the 1930s there were a number of radios produced (modified or original FADA) that were marketed as "Silent Radios", which came with the Acousticon Mystic Ear (bone-conduction under-the-pillow speaker).

Dictograph re-entered the entertainment electronics market with home phono sets in 1954/1955. Advertisements for these sets disappeared from contemporary literature as quickly as 1957, possibly due to anti-trust court procedures (Dictograph v. FTC, 217 F. 2d 821).

Some models:
Country Year Name 1st Tube Notes
USA  25 Dictogrand Table Loudspeaker   This is a rare model. Wood horn loudspeaker embebed in a wood box Impedance: 4000 oh... 
USA  13 Acousticon Six-Tone Hearing Device   Acousticon "hearing device" as advertised in The Literary Digest June 7th 1913.&... 
USA  25 Phono Unit   Coil resistance 4000 Ohm Magnetic distance adjustable to the membrane by pressing ... 
USA  22/23 Dictograph Radio Head Set / Headset R-1   3000 Ohms resistance. Introduced in 1922 as Dictograph Radio Head Set, later sold a... 
USA  36 Acousticon Mystic Ear   The "Mystic Ear" is a pillow speaker for bone-conduction of sound, similar to other pro... 
USA  26 Dictogrand Roll Speaker "Tabouret" R-90   Dictogrand Roll Speaker, model Tabouret (R-90). Cabinet in brown-finish mahogany. 
USA  56 101-B 12AX7  10 watt Dictograph Amplifier (peak of 15 watts). Collaro 3-speed intermix changer with ... 
USA  56 10W Amplifier Chassis 12AX7  Mono Push-Pull amplifier with several phono equalization settings. Used in the mode... 
USA  57 110-A 12AX7  10 watt Dictograph Amplifier (peak of 15 watts). 4-speed record changer with GE Magneti... 
USA  56 Model C   Shelf speaker system, with one 8" and two 3" speakers in mahogany or wheat cabinet. 
USA  56 Model E   Floor speaker system, with one 10" and two 3" speakers in mahogany or wheat cabinet. 
USA  56 Model D   Corner speaker system, with one 8" and two 3" speakers in mahogany or wheat cabinet. 


Further details for this manufacturer by the members (rmfiorg):

From USPTO trademark database. First commercially used 1946, filed 1958, registered 1959.tbn_guardian_dictograph_logo.png
From USPTO trademark database. First commercially used 1906, filed 1911, registered 1912.tbn_dictograph1.png
Letter head from 1924tbn_dictograph_letterhead_1924.jpg
Letter head from 1943tbn_dictograph_letterhead_1943.jpg
General Acoustic letter head from 1914tbn_general_acoustic_letterhead1914.jpg
Dictograph logo ca. 1950stbn_dictograph_logo_50s.jpg