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News 9 Now and News on 6 Now are American regional digital broadcast television networks that are owned by Griffin Media.The channels simulcast and rebroadcast local news programming seen on Griffin-owned CBS affiliates KWTV-DT (channel 9) in Oklahoma City and KOTV-DT (channel 6) in Tulsa, Oklahoma in their respective markets, along with select other programs.
A telephone magneto is a hand-cranked electrical generator that uses permanent magnets to produce alternating current from a rotating armature. In early telegraphy , magnetos were used to power instruments, while in telephony they were used to generate electrical current to drive electromechanical ringers in telephone sets and activate signals ...
The Tucker Telephone was invented by A. E. Rollins, [1] the resident physician at the Tucker State Prison Farm, Arkansas, in the 1960s. At the Tucker State Prison Farm, an inmate would be taken to the "hospital room" where he was most likely restrained to an examining table and two wires would be applied to the prisoner.
KWTV-DT (channel 9) is a television station in Oklahoma City, Oklahoma, United States, affiliated with CBS.It is the flagship broadcast property of locally based Griffin Media, and is co-owned with MyNetworkTV affiliate KSBI (channel 52).
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A telephone switchboard is a device that allows telephone lines to be interconnected, enabling the routing of calls between different phones or phone networks. [17] The switchboard operator was a person who manually connected calls by plugging and unplugging cords on the switchboard.
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Kellogg company logo as used from the 1920s to the 1950s. The Kellogg Switchboard and Supply Company was an American manufacturer of telecommunication equipment. Anticipating the expiration of the earliest, fundamental Bell System patents, Milo G. Kellogg, an electrical engineer, founded the company in 1897 in Chicago to produce telephone exchange equipment and telephone apparatus.