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George H. Sweigert (1920–1999) is widely credited as the first inventor to hold a patent for the invention of the cordless telephone.〔US Patent Number 3,449,750 DUPLEX RADIO COMMUNICATION AND SIGNALING APPARATUS FOR PORTABLE TELEPHONE ... G. H. SWEIGERT〕 Google Patents link. () Born in Akron, Ohio, Sweigert served five years in the US Army as a radio operator in World War II in Guadalcanal, Bougainville, Fiji and New Georgia (assigned to the 145th Headquarters Company under the 37th Infantry Division (United States)). Following the war, Sweigert attended Bowling Green State University near Toledo, Ohio. Sweigert credited his military service for invention of the radio telephone, citing experimentation with various antennas, signal frequencies, and types of radios. ==Radio telephone== With the patent application submitted on May 2, 1966 to the US Patent and Trademark Office, Sweigert submitted a working model of the phone in addition to the required description.〔(Viewable image of the original patent application );〕 A Cleveland ''Plain Dealer'' article, published shortly after the patent was filed, documented the first public demonstration of the cordless phone with a picture of the device and the inventor. The Cleveland ''Plain Dealer'' article cited that Sweigert actually used a part from his washing machine for the invention - the solenoid used to lift the phone's receiver when a current was sensed in the induction coil. Sweigert, who suffered severe back pain from a war injury, saw the device primarily helping handicapped and elderly people. The US Patent and Trademark Office issued US Patent 3,449,750 to Sweigert on June 10, 1969. The New York Times reported the award of the patent in the June 14th, 1969 edition. (page 52, column 6) In the article, Sweigert gives the first known printed description of how the "remote phone" might be used as a remote office or around the home, foreshadowing the way cell phones are used today. A friend told Sweigert that the article appeared in the Times, but Sweigert did not believe it completely until he received official word from the US Patent and Trademark Office later that week. Sweigert held two amateur radio licenses: W8ZIS (Ohio) and N9LC (Indiana). He was an amateur extra radio operator, the highest class of amateur radio. He also held a First Class Radiotelephone Operator's Permit issued by the Federal Communications Commission. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「George Sweigert」の詳細全文を読む スポンサード リンク
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