-
covert listening devices used in the
United States of
America was the
dictograph, an
invention of
Kelley M.
Turner patented in 1906 (US
Patent US843186A)...
-
Image of a
Vintage Acousticon Hearing Aid By
Dictograph Products Company, Made in the US,
Circa 1934....
- One was the
dictograph,
which was an
early hands-free inter-office
intercom system. Turner's
General Acoustic Company was
renamed Dictograph Products Company...
- Corporation,
Model S scale, 1927
Dictograph Acousticon Silver Anniversary Model 28
carbon hearing aid case, 1928
Dictograph Acousticon Silver Anniversary...
-
Georgina née Flett. Her
father was the
managing director of a
company called Dictograph Telephones that had been
founded by his
father in Yorkshire, and both...
-
cartridges used in
hearing aid
products from
manufacturers like Maico, Telex,
Dictograph, Otarian, Vocalite, and Trimm. In 1956,
Shure moved its
corporate headquarters...
- was constructed, it had
several communication systems; a telautograph,
dictograph, telephone, and
pneumatic tube systems. The New York
Times characterized...
- so-called Spy Squad. Supposedly, he had an
especial aptitude for
placing dictographs (eavesdropping devices).
According to one historian, Kynette's career...
- P.
Werner and his wife, Mrs.
Helen M.
Werner . . . .
Discovery of two
dictograph microphones in the
Werner offices and the
pilfering of
their office were...
- P. Gearhardt, were
credited with
breaking the case
after installing a
dictograph in the
house of a bank
robbery suspect.
Overhearing a
conversation about...
