Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 5339117 | Tuning apparatus for television system and method of controlling the same Tuning apparatus for a television system, comprising a rotary encoder having a slidable and rotatable channel changing mechanism, the rotary encoder outputting a plurality of signals with a phase difference with respect to one another, corresponding to a ... | 08/16/1994 |
| 4305156 | Rotary switch type television tuner A television tuner comprises a rotary switching shaft, switching plates associated with the rotary switching shaft, and an input tuning portion, an interstage tuning portion and a frequency converting portion coupled to the switching plates and adapted fo... | 12/08/1981 |
| 4253074 | Push pre-setting fine tuning device for turret type television tuners The present fine tuning device comprises a fine tuning shaft mounted concentrically around a main channel selecting shaft supported in a chassis base. A plate spring member is disposed on the chassis for thrust biasing the fine tuning shaft. A gear member... | 02/24/1981 |
| 4175259 | Construction of preset plate for VHF tuner Disclosed is a preset plate for a VHF tuner, having a first and a second rotary bodies which are unitarily mounted on a main shaft of the VHF tuner. The first rotary plate has a plurality of coils corresponding to respective channels to be selected and a ... | 11/20/1979 |
| 4043207 | Frequency selector comprising a freewheel coupling A frequency selector comprising a first control member for frequency preselection changing and a second control member for changing the preselection frequency. The control members are coupled such that unintended changing of the preselection frequency by ... | 08/23/1977 |
| 4041422 | Fine tuning assembly for preset tuner A plurality of fine tuning elements are mounted on a disc which is rotatable by a selector shaft so that a selected tuning element is in a tuning position. Each tuning element comprises a screw with a gear mounted at the end thereof. A tuning shaft is rot... | 08/09/1977 |
