Did You Know...
...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 4154512 | Electrochromic indicator The proposed electrochromic indicator can be used in clock dials and band selector indicators of radio receivers and it comprises electrochromic cells placed in series to form a closed circuit. Each point of connection of the leads of said electrochromic ... | 05/15/1979 |
| 4147987 | Superheterodyne receiver of scanning type A superheterodyne receiver of a scanning type, comprising a high frequency amplifier, a mixer, a local oscillator, an intermediate frequency amplifier, a detector, an audio frequency amplifier, a loud speaker, and an automatic scanning/manual scanning sel... | 04/03/1979 |
| 4146839 | Channel traffic monitoring radio transceiver A channel traffic monitoring radio transceiver having basic transceiver components in combination with a microcontroller which provides the electronic operations which enables the transceiver to automatically establish the least congested channel of commu... | 03/27/1979 |
| 4138647 | Memory type tuning system for storing information for a limited number of preferred tuning positions A memory type tuning system having memory locations for storing information corresponding to a limited number of preferred tuning positions includes apparatus for examining the contents of each of the memory locations when information corresponding to a t... | 02/06/1979 |
| 4114104 | Channel skip memory system for radio receiver A channel skip memory system for radio receiver having a single channel skipping switch to inhibit the radio receiver from receiving any of selected channels of a plurality of channels of predetermined frequencies while scanning repetitively those channel... | 09/12/1978 |
| 4114102 | Radio channel skip system A rapid channel skip system for radio receiver having a single channel skipping switch to inhibit the radio receiver from receiving any of selected channels of a plurality of channels of predetermined frequencies while scanning repetitively those channel ... | 09/12/1978 |
| 4114103 | Crystalless scanning radio receiver A scanning FM monitor receiver is disclosed which is of the superheterodyne type and is capable of scanning and receiving a plurality of channels on a plurality of bands. The receiver incorporates a phase-locked-loop frequency synthesizer whih eliminates ... | 09/12/1978 |
| 4092594 | Crystalless scanning radio receiver controlled by processing means An FM receiver and transmitter apparatus is disclosed which is of the superheterodyne type and is capable of scanning and receiving a plurality of channels on a plurality of frequency bands as well as transmitting on a plurality of channels. The receiver ... | 05/30/1978 |
| 4057760 | Frequency synthesized scanner having conductive programming elements for channel selection A multi-band radio receiver is disclosed for automatically and sequentially tuning to a plurality of discreet, separate preselected frequencies. The receiver incorporates a phase locked loop frequency synthesizer which includes two separate voltage tuned ... | 11/08/1977 |
| 4031473 | Station selecting device having improved monitor A station selecting system for use in a multi-channel communication system having a plurality of display devices respectively corresponding to the communication channel. Circuitry is provided for placing the system in a monitor mode of operation where all... | 06/21/1977 |
| 4005368 | Memory tuning system with automatic two speed display An all-channel two mode television tuning system includes a counter for sequentially generating channel numbers to adjust tuning. An 82 × 1 bit read/write memory is addressed in a program mode by the generated channel numbers to provide locations for sto... | 01/25/1977 |
| 4002985 | Channel selection indicator for memory tuning system An all-channel two mode television tuning system includes a counter for sequentially generating channel numbers to adjust tuning. An 82 × 1 bit read/write memory is addressed in a program mode by the generated channel numbers to provide locations for sto... | 01/11/1977 |
| 3974452 | Battery powered scanning receiver with synchronous power cycling through electrically operable visual indicators A receiver is disclosed for signal-seeking operation on a plurality of channels. The receiver uses power cycling of the RF amplifier stage, mixers, local oscillators and intermediate frequency amplifiers which is in synchrony with the electronic stepping ... | 08/10/1976 |
| 3968444 | Skip band tuner A digital tuning controller is provided which utilizes the storage of codes relating to the location and bandwidth of unused or illegal frequency bands to control a frequency acquisition operation with minimum circuitry. A two digit keyboard entry correspondin... | 07/06/1976 |
| 3962644 | Crystalless scanning radio receiver controlled by processing means A scanning FM monitor receiver is disclosed which is of the superheterodyne type and is capable of scanning and receiving a plurality of channels on a plurality of frequency bands. The receiver incorporates a phase-locked-loop frequency synthesizing means... | 06/08/1976 |
| 3961261 | Crystalless scanning radio receiver A scanning FM monitor receiver is disclosed which is of the superheterodyne type and is capable of scanning and receiving a plurality of channels on a plurality of bands. The receiver incorporates a phase-locked-loop frequency synthesizer which eliminates... | 06/01/1976 |
