Raymond A. Heising was an American radio and telephone pioneer.

Heising was born in Albert Lea, Minnesota

Albert Lea, Minnesota

Albert Lea is a city in and the county seat of Freeborn County in the southeastern part of the U.S. state of Minnesota. The population was 18,016 at the 2010 census....

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

University of North Dakota

The University of North Dakota is a public university in Grand Forks, North Dakota, USA. Established by the Dakota Territorial Assembly in 1883, six years before the establishment of the state of North Dakota, UND is the oldest and largest university in the state and enrolls over 14,000 students. ...

, and in 1914 received his master's degree from the University of Wisconsin–Madison

University of Wisconsin–Madison

The University of Wisconsin–Madison is a public research university located in Madison, Wisconsin, United States. Founded in 1848, UW–Madison is the flagship campus of the University of Wisconsin System. It became a land-grant institution in 1866...

. From 1914 until his retirement in 1953, Dr. Heising worked for the Western Electric Company and Bell Labs

Bell Labs

Bell Laboratories is the research and development subsidiary of the French-owned Alcatel-Lucent and previously of the American Telephone & Telegraph Company , half-owned through its Western Electric manufacturing subsidiary.Bell Laboratories operates its...

, 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

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

, and for transoceanic and ship-to-shore public communications. He also conducted research on ultra-short waves, electronics, and piezoelectric devices, and 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

American Institute of Electrical Engineers

The American Institute of Electrical Engineers was a United States based organization of electrical engineers that existed between 1884 and 1963, when it merged with the Institute of Radio Engineers to form the Institute of Electrical and Electronics Engineers .- History :The 1884 founders of the...

 and American Physical Society

American Physical Society

The American Physical Society is the world's second largest organization of physicists, behind the Deutsche Physikalische Gesellschaft. The Society publishes more than a dozen scientific journals, including the world renowned Physical Review and Physical Review Letters, and organizes more than 20...

. He was awarded the 1921 IEEE Morris N. Liebmann Memorial Award

IEEE Morris N. Liebmann Memorial Award

The initially called Morris Liebmann Memorial Prize provided by the Institute of Radio Engineers , the IEEE Morris N. Liebmann Memorial Award was created in 1919 in honor of Colonel Morris N. Liebmann. It was initially given to awardees who had "made public during the recent past an important...

, the Modern Pioneer Award from the National Association of Manufacturers

National Association of Manufacturers

The National Association of Manufacturers is an advocacy group headquartered in Washington, D.C. with 10 additional offices across the country...

 in 1940, an honorary Doctor of Science degree from the University of North Dakota

University of North Dakota

The University of North Dakota is a public university in Grand Forks, North Dakota, USA. Established by the Dakota Territorial Assembly in 1883, six years before the establishment of the state of North Dakota, UND is the oldest and largest university in the state and enrolls over 14,000 students. ...

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