Leonid Ivanovich Kupriyanovich (, 14 July 1929 – 1 January 1996) was a
Soviet
The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
engineer from
Moscow
Moscow is the Capital city, capital and List of cities and towns in Russia by population, largest city of Russia, standing on the Moskva (river), Moskva River in Central Russia. It has a population estimated at over 13 million residents with ...
who is credited for early development of a
mobile phone
A mobile phone or cell phone is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones ( landline phones). This rad ...
device.
Career
In 1953, Kupriyanovich graduated from
Bauman Moscow State Technical University.
In 1955, Leonid Kupriyanovich published the description of a simple
walkie-talkie
A walkie-talkie, more formally known as a handheld transceiver, HT, or handheld radio, is a hand-held, portable, two-way radio transceiver. Its development during the Second World War has been variously credited to Donald Hings, radio engineer A ...
amateur radio station for personal use in the Soviet amateur radio magazine "Radio," 1955, N2. It operated on two vacuum tubes. The walkie-talkie weighed about 1.2 kg and had 1.5 km operating distance.
In 1957 Leonid Kupriyanovich presented a micro walkie-talkie radio version the size of a matchbox, 50g in weight and had 2 km operating distance.
Also in 1957 he made an experimental model of a wearable automatic radio landline extender ("radiophone"), called LK-1 (not to be confused with
the cancelled Soviet spacecraft of the same name or LK-1 (
ЛК-1) the first Soviet
trolleybus
A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tramin the 1910s and 1920sJoyce, J.; King, J. S.; and Newman, A. G. (1986). ''British Trolleybus Systems'', pp. 9, 12. London: Ian Allan Publishing. .or troll ...
). His device consisted of a stationary module and a portable handset. LK-1 was reportedly 3 kg in weight, 20–30 km operating distance, and 20–30 hours of battery life. Leonid Kupriyanovich patented this landline extender in 1957 (author's certificate № 115494, 1.11.1957). The stationary module, following the author's description, could serve several customers. In 1958, Kupriyanovich purportedly made the new experimental "pocket" model radio phone. This phone supposedly had 0.5 kg weight. Kupriyanovich proposed the device to serve more customers and named it a correllator.
In 1961, Leonid Kupriyanovich presented a pocket automatic radio phone that could fit in the palm of a hand. This pocket mobile phone weighed only 70 g and had an 80 km operating distance. Kupriyanovich told correspondents of the АПН news agency that in the USSR, the production of this device was planned. He also reported the plans for the construction of ten base stations in Moscow to create a mobile communication network. The first station in Moscow was supposedly planned to be constructed in Mazilovo.
Мартин Купер был не первым.
Олег Измеров.
In the 1960s Leonid Kupriyanovich's electronic set "Rhytmoson" was manufactured in the USSR and purchased for medical purposes.
See also
* List of Russian inventors
References
Further reading
* Куприянович Л.И. Карманные радиостанции. - М.-Л: Госэнергоиздат, 1957. - 32 с.
* Борноволоков Э. П., Куприянович Л. И. Переносные УКВ радиостанции. — М.: Издательство ДОСААФ, 1958.
* Куприянович Л. И. Радиоэлектроника в быту. — М.-Л.: Госэнергоиздат, 1963. — 32 с.
* Куприянович Л. И. Карманные радиостанции, 1960.
* Куприянович Л. И. Биологические ритмы и сон. — М.: Наука, 1976. — 120 с.
External links
A history of mobile phones : a forgotten sensation
1929 births
Soviet engineers
1996 deaths
Soviet inventors
{{USSR-engineer-stub