Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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 |
| 6195783 | Process and apparatus for synchronizing the block counter in an RDS radio data receiver A process and apparatus for synchronizing the block counter of an RDS radio data receiver is described. According to the process, the bits stored in a 26-bit shift register, are cycled at least n times in said register, n being the number of allowable off... | 02/27/2001 |
| 6169773 | System for synchronizing a block counter in a radio-data-system (RDS) receiver A device for synchronization of a block counter in an RDS receiver, the decoder of which, after synchronization has been effected, is capable of performing an error correction in the received bits. The process steps which can lead to synchronization of th... | 01/02/2001 |
| 6031918 | Device for controlling the volume of a car radio as a function of driving noise In a device for controlling the volume of a car radio as a function of driving noise, an acceleration sensor can be mechanically connected with the body of the motor vehicle, to generate a signal dependent on driving noise.... | 02/29/2000 |
| 5799393 | Method for producing a plated-through hole on a printed-circuit board A method for producing a plated-through hole on a printed-circuit board, whereby the printed-circuit board is initially bored, catalyzed, and patterned. The plated-through hole is then fashioned in an electrochemical deposition process so as to make it fu... | 09/01/1998 |
| 5737834 | Process and apparatus for automatically assembling the tops and bottoms of circuitboards with SMDS A process and a means for automatic assembly of the top and bottom sides of circuitboards with SMDs is described. The SMD assembly machine in this means has two parallel pickup stations for conveyor belts for the circuitboards for this purpose.... | 04/14/1998 |
| 5673324 | Radio receiver circuit for deriving at least one reception quality signal In a circuit for deriving at least one quality signal that is dependent on the quality of a received signal, where the received signal is demodulated, a first auxiliary signal which is dependent on the field strength, and a second or further auxiliary sig... | 09/30/1997 |
| 5659947 | Device for automatically populating a top and a bottom side of printed-circuit boards with SMD components A device is described for automatically populating the top and bottom side of printed-circuit boards with SMD components, synchronously controllable switching points being arranged in the entry and outlet of the SMD (surface mounted device) insertion devi... | 08/26/1997 |
| 5661809 | Radio receiver having digital signal processing A radio receiver is provided having digital signal processing, a first and a second auxiliary signal derived from a received stereo multiplex signal, the first auxiliary signal being dependent upon the existence of signal components, whose frequency lies ... | 08/26/1997 |
| 5631963 | Circuit arrangement for the recognition of adjacent channel interference A circuit arrangement for recognizing adjacent channel interference in a stereo radio receiver, in which a stereo multiplex signal is present. An adjacent channel interference signal is obtained as a function of a direct voltage portion of the stereo mult... | 05/20/1997 |
| 5606619 | Circuit arrangement for deriving a signal indicating noise in a received stereo multiplex signal A circuit arrangement for deriving the signal indicating noise in a received stereo multiplex signal, wherein the stereo multiplex signal is present as a digital signal with a first sampling rate that is substantially higher than twice the upper limit of ... | 02/25/1997 |
| 5594799 | Circuit for suppression of short-lived noise-phenomena in a digital audio signal In a circuit for suppressing short-lived noise phenomena in a digital audio signal, in particular during a temporary test reception of another transmitter, the audio signal is multiplied by a factor which, prior to the appearance of the noise phenomenon, ... | 01/14/1997 |
| 5592557 | Radio receiver with digital signal processing In a radio receiver with digital signal processing, a stereo multiplex signal received and the useful signals derived therefrom are processed in digital form at a first sampling rate. The subsidiary signals derived from the stereo multiplex signal are at ... | 01/07/1997 |
| 5584060 | Circuit arrangement for derivation of a signal dependent on the change direction of the incoming signal level In a circuit arrangement for deriving a signal dependent on the change direction of the incoming signal level in a radio receiver, controllable by a microcomputer, a comparator is provided outside the microcomputer to which a signal representing the respe... | 12/10/1996 |
| 5561716 | Demodulator In a demodulator for a stereo signal transmitted by amplitude and phase modulation of a carrier, a phase signal and a quantity signal are formed. By multiplication of the quantity signal with the tangent of the phase signal reduced by a value to be preset... | 10/01/1996 |
| 5550922 | Vehicle radio automatic volume adjustment system The invention relates generally to a method for adjusting the volume of a vehicle radio to the surrounding noise level, where the audio signal level, sampled downstream of a setting element (2), placed in the path of the audio signal, and a driving noise ... | 08/27/1996 |
| 5537448 | Switchable PLL circuit with constant amplification gradient An improved Phase-Locked Loop (PLL) radio receiver circuit includes a phase detector, either an active loop filter or a set of parallel, alternately selectable loop filters, and a Voltage-Controlled Oscillator (VCO) whose input is connected to the output ... | 07/16/1996 |
| 5535280 | Circuit for removing ignition noise from a multiplex signal In a digital circuit which removes ignition noise from a multiplex signal in a radio receiver, especially in a car radio, the multiplex signal is supplied via a high-pass filter (3) and a squaring or absolute value determing circuit (4) as a digital signa... | 07/09/1996 |
| 5521944 | Circuit for a demodulator for a radio data signal in a radio receiver In a circuit for a demodulator of a radio data signal in a radio receiver, the multiplex signal in digital form is mixed into the baseband, in two phase positions shifted 90° with respect to each other, after band-pass filtering, together with a referenc... | 05/28/1996 |
| 5506906 | Radio receiver station-seeker stop-signal generator Radio receivers which scan through a predetermined band of the radio spectrum, in a station-seeking mode, must independently detect whether the currently tuned frequency is the central frequency of the transmitting station and whether this transmitter pro... | 04/09/1996 |
| 5493717 | Adjacent channel interference detection & suppression circuit FM radio receivers, particularly in moving vehicles, are subject to intermittent adjacent-channel interference. It is known to detect such interference and suppress it by narrowing bandwidth in the Intermediate Frequency (IF) signal path. However, it is d... | 02/20/1996 |
| 5491755 | Circuit for digital processing of audio signals In a circuit for digital processing of audio signals in a radio receiver, preferably in a car radio, the audio signals pass through a digital filter designed as a tone control, whose frequency response can be controlled with supplied coefficients, and a v... | 02/13/1996 |
| 5483694 | Radio receiver with an intermodulation detector In a radio receiver with an input circuit which can be supplied with received signals, with a mixer for deriving an IF signal, and with an IF filter, the passband range corresponds to a usable signal range of the received signal, the received signals are ... | 01/09/1996 |
| 5457722 | Circuit for frequency division by an odd number In a circuit for dividing the frequency of a received signal by an uneven number, initially another signal is derived through half-integer frequency division and thereafter divided by two. Preferably, a frequency division is performed alternately by an in... | 10/10/1995 |
| 5457423 | Radio data signal demodulator with clock signal recovery For a demodulator for radio data signals, where transmission of these signals is carried out through phase shifting of a suppressed subcarrier, where a multiplex signal, which contains a signal with the frequency of the subcarrier passes through a band-pa... | 10/10/1995 |
| 5442709 | Circuit for decoding a multiplex signal in a stereo receiver In a circuit for decoding a multiplex signal in a stereo receiver, where the multiplex signal contains a composite signal (L+R) in the base band, a subcarrier modulated with a difference signal (L-R), and a pilot signal with half the frequency of the subc... | 08/15/1995 |
| 5430890 | Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency Digital tuning of a locally generated frequency supplied to a frequency converting mixer, a mobile radio receiver is provided with great economy of components by utilizing the sampling rate oscillator for an analog-to-digital converter provided at the out... | 07/04/1995 |
| 5428827 | Radio receiver with a radio data signal (RDS) decoder A radio data system (RDS) receiver has a station selector circuit including a microprocessor, several Alternative Frequency (AF) memory cells, and at least one learning memory cell associated with each AF memory cell. In a preferred embodiment, a counter ... | 06/27/1995 |
| 5414384 | Demodulator for radio data signals In a demodulator for use in the Radio Data System (RDS) as defined by the European Broadcasting Union, transmission of these signals is carried out through phase shift modulation of a suppressed subcarrier, a multiplex signal, which contains a signal with... | 05/09/1995 |
| 5394562 | Power supply circuit for a two-mode vehicular radio receiver A vehicular radio receiver having a decoder and memory for traffic announcements digitally modulated on a carrier wave that is otherwise modulated by audio signals has separate power input terminals for the portions (A) necessary for recognizing and stori... | 02/28/1995 |
| 5355393 | Digital oscillator for carrier frequency synchronization A new digital oscillator is described that can be synchronized with a broadcast digital input signal by iteratively rotating the phase of the complex oscillator signal by increasing or decreasing the components, depending upon the phase difference between... | 10/11/1994 |
| 5349699 | Radio receiver with masking of switchover noise The Radio Data System (RDS) protocol promulgated by the European Broadcasting Union provides for alternate frequencies (AF) for the same broadcast. Receivers periodically switch over to such an alternate frequency, leading to momentary crackling noises. I... | 09/20/1994 |
| 5345604 | FM vehicle radio with modular phase shifters A modularly-designed FM vehicle radio for operation in connection with a plurality of antennas is disclosed, where the summing circuit consists of a series connection of the secondary coils of the output transformers of the input stages.... | 09/06/1994 |
| 5345607 | RDS radio receiver with program type mode A program type PTY mode is integrated into an RDS radio receiver with a limited access surface by means of a mode switch in that the function of the station keys is changed to that of program type keys and that by way of a multiple actuation of the keys i... | 09/06/1994 |
| 5317313 | Method and apparatus for analog/digital conversion In an A/D converter for electrical signals, the difference, between the instantaneous analog input signal Y(t) and a previous analog signal value Y(t-T), is converted in a fast analog-to-digital converter (3) to a digital sum value. This sum value is adde... | 05/31/1994 |
| 5191312 | Automotive accessory control center A combination of automobile radio and city call or paging receiver equipped with a display (4) has the additional feature of a vehicle speed sensor (24) which is used to block display of possibly distracting information whenever the vehicle exceeds a pred... | 03/02/1993 |
| 5135341 | Device for fastening an electronic equipment to a mounting wall On the rear side of the front panel (1) of an electronic equipment, at each lateral end which overlaps an edge of an aperture (3) into which the electronic equipment is being inserted, bushings (5) having rearwardly extending catch members (6) are fastene... | 08/04/1992 |
| 5119093 | Apparatus for converting a signal of a first sample rate into a signal of a second sample rate Sample values of a digital signal of a first sample rate are supplied to a digital filter for conversion into a digital signal of a second sample rate. The coefficients of the digital filter are calculated by a processor from the ratio of the sample rates... | 06/02/1992 |
| 5077827 | Warning receiver readiness monitoring circuit A warning radio receiver is adapted to receive not only a recognition signal for emergency broadcast but also two further recognition signals, namely a warning network transmitter recognition signal and a warning region recognition signal. If, for example... | 12/31/1991 |
| 5012255 | Combination antenna and windshield heater A motor vehicle windshield is formed with a transparent vapor-deposited metal coating for windshield heating and with an antenna for radio reception. Preferably, the metal coating is connected to an inner conductor of a coaxial cable leading to the radio ... | 04/30/1991 |
| 4958154 | System for wireless remote actuation of differing siren programs A programming unit (1) for ON-OFF switching of a siren or similar warning device can be provided with remote actuation capability by connecting it to a radio receiver tuner (27) and radio data signal decoder (25). The output of the signal decoder (25) is ... | 09/18/1990 |
