RARE \"Telephone Pioneer\" Raymond A Heising Signed 3X5 Card For Sale

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

---

RARE \"Telephone Pioneer\" Raymond A Heising Signed 3X5 Card:
$499.99

Up for sale a RARE! "Telephone Pioneer" Raymond A Heising Hand Signed 3X5 Card. 

ES-3967D

Raymond A. Heising (August 10, 1888

- January 1965) was an American radio and telephone pioneer. Heising was born

in Albert Lea, Minnesota,

graduated in 1912 in electrical engineering from the University of North Dakota,

and in 1914 received his master's degree from the University of

Wisconsin–Madison. From 1914 until his retirement in 1953, Dr.

Heising worked for the Western Electric Company and Bell Labs, and subsequently as a consulting engineer and

patent agent. Heising played a major role in the development of military radio telephone systems in World War I, and for transoceanic and ship-to-shore public

communications. He also conducted research on ultra-short waves, invented important modulation systems including the constant potential

system, the grid modulation system, the rectifier modulation system used in

carrier telephony, and the constant-current or Heising modulation system,

which was standard on most early radio telephone transceivers. Heising held

over 100 patents, including those on Class C amplifiers and diode-triode detector amplifier

circuits, and was a Fellow of the American

Institute of Electrical Engineers and American Physical Society.

He was awarded the 1921 IEEE Morris

N. Liebmann Memorial Award, the Modern Pioneer Award from the National

Association of Manufacturers in 1940, an honorary Doctor of

Science degree from the University of North Dakota in

1947, and the Radio Club of America's Armstrong Medal in 1954. 

Telephone - BEAVIS AND BUTT-HEAD - Vintage - MTV - OPEN BOX NEW - RARE

$99.00

Vintage Rotary Telephone Blue 1980’s Untested Rare Retro Technex International

$124.98

RARE Antique c1900 Farr Chicago Oak Crank Wood Wall Telephone Complete, NR

$358.15

*RARE* Vintage Monarch Telephone Mfg Co Hand Crank Telephone Full Wood USA Made

$199.99

Rare Western Electric Inkwell Blue Bell Telephone Paperweight Antique

$60.00

RARE ANTIQUE S.I.T VIOLIN PHONE in its juice industrial company phones

$160.84

Western Electric ComKey 416 Rare Speakerphone Set With Face Plate. 

$175.00

RARE "Telephone Pioneer" Raymond A Heising Signed 3X5 Card

$499.99