Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed. Written By: Erik Gregersen. See Article History. Alternative Title: Marty Cooper. Learn More in these related Britannica articles: Mobile telephone , portable device for connecting to a telecommunications network in order to transmit and receive voice, video, or other data.
Mobile phones typically connect to the public switched telephone network PSTN through one of two categories: The United States Navy , major branch of the United States armed forces charged with the defense of the country at sea, the seaborne support of the other U.
The war reached international proportions in June when North Korea, supplied and advised by the Soviet Union, invaded the South. Motorola, Inc. In it split into two companies: Motorola Mobility and Motorola Solutions. Its headquarters are located in Schaumburg, Illinois.
Police , body of officers representing the civil authority of government. Police typically are responsible for maintaining public order and safety, enforcing the law, and preventing, detecting, and investigating criminal activities. These functions are known as policing. Police are often also entrusted with various licensing and regulatory activities.
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Martin Cooper (inventor)
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- Martin Cooper invented the mobile phone in 1973. Was inspired by Star Trek!
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- The History of Cellular Phones!
Thank You for Your Contribution! Uh Oh. There was a problem with your submission. Please try again later. On April 3, , Cooper and Mitchell demonstrated two working phones to the media and to passers-by prior to walking into a scheduled press conference at the New York Hilton in midtown Manhattan.
Joel S. Engel at ATT. I'm calling you from a cell phone, a real handheld portable cell phone.
Worked on New Police Radios
That first cell phone began a fundamental technology and communications market shift to making phone calls to a person instead of to a place. Cooper worked at Motorola for 29 years; building and managing both its paging and cellular businesses. He also led the creation of trunked mobile radio, quartz crystals, oscillators, liquid crystal displays , piezo-electric components, Motorola A.
Rose to fix a flaw in quartz crystals used in Motorola's radios which encouraged the Company to mass-produce the first crystals used in wrist watches. Cooper and his wife Arlene Harris founded Dyna LLC in as a home base for their developmental and support activities for the new companies, Subscriber Computing Inc.
He serves on industry, civic and national governmental groups including the U. In Cooper co-founded Cellular Payphone Inc. In Cooper co-founded Arraycomm a developer of software for mobile antenna technologies. Under his leadership, the Company grew from a seed-funded startup in San Jose, California, into the world leader in smart antenna technology with patents issued or pending, worldwide.
Cooper found that the ability to transmit different radio communications simultaneously and in the same place has grown at the same pace since Guglielmo Marconi 's first transmissions in The Law states that the maximum number of voice conversations or equivalent data transactions that can be conducted in all of the useful radio spectrum over a given area doubles every 30 months.
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The History of Cellular Phones - Who Invented the Cell Phone?
Martin Cooper. Chicago , Illinois , United States. Arlene Harris m. This section needs additional citations for verification.
Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: Retrieved April 4, Scene World. Retrieved March 1, Mensa Bulletin. American Mensa July June 17,