William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
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AbstractA method and apparatus for remotely adjusting the temperature of a closed environment such as a home or building comprising a means for transmitting a coded up-temperature signal and a down-temperature signal as a modulated radio frequency carrier wave, from a portable, battery-powered command module to a stationary receiver operatively connected to a heating/cooling unit. The received signal, upon decoding, activates the heating/cooling unit until the sensed temperature of the building matches the desired temperature. Additionally, a preset temperature stored in memory may be replaced remotely using the command module with a new preset temperature. The apparatus is designed to replace an existing thermostat and to be easily usable, especially by those who are disabled, bedridden or handicapped, to alter the temperature of their environments to comfortable levels. | InventorsAssigneeApplicationNo. 07/211277 filed on 06/24/1988US Classes:236/51, DISTANCE-ADJUSTED340/825.69Radio linkExaminersPrimary: Wayner, William E.Attorney, Agent or FirmUS Patent References3605877, 4606401, Programmable thermostatIssued on: 08/19/1986 Inventor: Levine , et al.4704607System for remotely adjusting a parameter of an electrical circuit within an enclosure Issued on: 11/03/1987 Inventor: Teather , et al. International ClassG05D 23/19 (20060101) |