| In 1908, U.S. Patent 887,357 for a wireless phone | | | | rather heavy portable handset, Cooper made the |
| was issued in to Nathan B. Stubblefield of Murray, | | | | 1st call on a hand-held mobile phone on April 3, |
| Kentucky. He applied this patent to "cave radio" | | | | 1973 to a rival, Dr. Joel S. Engel of Bell Labs. |
| telephones and not without delay to cellular | | | | In 1983, Motorola DynaTAC was the 1st licensed |
| telephony as the term is at present accepted. | | | | mobile phone by FCC in the US. In 1984, Bell |
| Cells for mobile phone base stations were | | | | Laboratories developed modern commercial cellular |
| invented in 1947 by Bell Laboratories engineers at | | | | technology (based, to a large extent, on the |
| AT&T and further developed by Bell Labs | | | | Gladden, Parelman Patent), which employed |
| during the 1960s. Radiophones have a long and | | | | multiple, centrally controlled base stations ( cell |
| varied history returning to Reginald Fessenden's | | | | sites ), each providing service to a small area (a |
| invention and shore-to-ship demonstration of radio | | | | cell). The cell sites would be set up such that cells |
| telephony, thru the second World War with army | | | | partially overlapped. In a cellular system, a signal |
| use of radio telephony links and civil services in | | | | between a base station (cell site) and a terminal ( |
| the 1950s, while hand held cellular radio devices | | | | telephone ) only need be powerful enough to |
| have been available since 1973. A patent for the | | | | reach between the 2, so the same channel may |
| 1st wireless phone as we know today was issued | | | | be employed simultaneously for separate |
| in US Patent Number 3,449,750 to George | | | | conversations in different cells. |
| Sweigert of Euclid, Ohio on June 10, 1969. | | | | Until the early 1990s, following arrival of the |
| Visit our website for blackberry cases | | | | Motorola MicroTAC, most mobile telephones were |
| Martin Cooper, a Motorola researcher and | | | | too enormous to be carried in a jacket pocket, so |
| executive is widely considered to be the inventor | | | | they were generally installed in automobiles as |
| of the first practical mobile phone for hand-held | | | | vehicle telephones. With the miniaturization of |
| use in a non-vehicle setting. Cooper is the inventor | | | | digital elements and the development of more |
| named on "Radio phone system" filed on October | | | | complicated batteries, mobile telephones became |
| 17, 1973 with the US Patent Office and later | | | | smaller and lighter. |
| issued as US Patent 3,906,166. Using a modern, if | | | | |