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.
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 |
| 7142501 | Method and apparatus for eliminating near-end crosstalk in a digital subscriber line system A method and apparatus for eliminating near-end crosstalk in a communication network are disclosed. Crosstalk generated by communication occurring on a second line is detected on a first line and the phase of the crosstalk detected on the first line is determined. A... | 11/28/2006 |
| 6925244 | Apparatus for recording/reproducing high resolution video signal A video signal recording/reproducing apparatus for recording/reproducing a high resolution video signal wherein the video resolution is enhanced by shifting a carrier frequency to a higher band in frequency modulation in a VCR's video signal recording mode, and by d... | 08/02/2005 |
| 6907089 | Digital demodulation and applications thereof A digital demodulator that may be utilized in integrated radio receivers and/or integrated radios includes a mixing section, 1st and 2nd digital comb filters, phase locked loop module, and a data recovery module. The mixing section is operably ... | 06/14/2005 |
| 6728465 | Semi-reconfigurable subband OADM A partially configurable optical add/drop multiplexer (OADM) is provided. Fixed single channel and wideband tunable fiber Bragg gratings may be used in combination. OADM channel configuration may be changed by tuning one or more tunable fiber Bragg gratings. ... | 04/27/2004 |
| 6690877 | Magnetic tape recording apparatus In a magnetic tape recording apparatus for recording an FM luminance signal and a low frequency converted chrominance onto tracks of a magnetic tape, both of a frequency of the FM luminance signal and a spectrum distribution of the low frequency converted... | 02/10/2004 |
| 5153741 | Crosstalk cancelling circuit for playback chrominance signal of VTR A crosstalk cancelling circuit for a VTR eliminates adjacent-track crosstalk in a playback down-converted chrominance signal, with the resultant signal and a playback luminance signal being supplied to respective output terminals for re-recording by anoth... | 10/06/1992 |
| 5091788 | Crosstalk cancelling circuit for removing crosstalk component from reproduced signal A crosstalk cancelling circuit for use in video tape recorders. The cancelling circuit comprises a first multiplier for multiplying a frequency-lowered conversion chrominance signal reproduced from a magnetic tape by a local oscillating signal with a pred... | 02/25/1992 |
| 4881134 | Comb filter for the rejection of intertrack chromonance crosstalk In known color-under video recorders intertrack chrominance cross talk is eliminated by comb-filtering of the back-converted chrominance signal. However, if the delay circuit needed in the comb filter is a CCD delay line this will give rise to problems bo... | 11/14/1989 |
| 4754340 | Method of reproducing a chrominance signal from a previously low-range-converted chrominance signal using comb filtering and sampling A low-range-converted chrominance signal is demodulated into two color difference signals. The two color difference signals are each filtered by a comb filter to eliminate undesired components. The two color difference signals, having been filtered, are m... | 06/28/1988 |
| 4661863 | Color video signal recording and reproducing apparatus A color video signal recording and reproducing apparatus comprises a first circuit for generating a low-frequency luminance signal, a second circuit for forming a time base compressed line-sequential color difference signal, a circuit for generating a tim... | 04/28/1987 |
| 4554595 | Video signal recording/reproducing apparatus with crosstalk and tracking error elimination A video signal recording/reproducing apparatus in which video tracks continuously arranged on a magnetic tape are sequentially and periodically classified into first to fourth tracks. A video signal is recorded on the first track such that its phase is al... | 11/19/1985 |
| 4528599 | FM angular modulation system for video signal recording A method and apparatus for recording a color video signal on a recording medium such as video disk in which effects of crosstalk between adjacent recorded tracks are eliminated and the level and phase of the subcarrier signal are maintained constant. The ... | 07/09/1985 |
| 4480265 | PAL Comb filter A PAL comb filter having a first and a second parallel transmission path. The first path includes a time delay network. This time delay network has a time delay equal to one line period H instead of two line periods as in conventional PAL comb filters. Fo... | 10/30/1984 |
| 4344082 | Apparatus for recovering a frequency-converted chrominance component that is substantially free of cross-talk components Apparatus is provided for recovering, from a composite video signal which is reproduced from successive record tracks on a record medium, a frequency-converted chrominance component that is substantially free of cross-talk components. The frequency-conver... | 08/10/1982 |
| 4312013 | Non-linear aperture correction circuit In a video disc system, geometric variations are recorded on the surface of the record and are representative of recorded picture and sound information. In a video disc playback apparatus for recovering picture and sound information from such a prerecorde... | 01/19/1982 |
| 4302768 | System for reducing or suppressing noise components in television signal A system for reducing or suppressing the noise components in the TV signal wherein the component representative of the difference between the as-input (or as-received) TV signal and the TV signal which has been delayed by one horizontal scanning period is... | 11/24/1981 |
| 4272786 | Video disc playback apparatus with non-linear aperture correction In a video disc playback apparatus, a playback stylus is utilized for the recovery of information from prerecorded disc records. In one system, geometric variations are recorded on the surface of the record and are representative of recorded picture and s... | 06/09/1981 |
| 4245234 | Method of recording color television signals as a repetitive series of normally recorded lines and phase reversed lines For recording and/or reproducing color television signals steps are proposed which enable the crosstalk signal from an adjacent track to be suppressed during reproduction. This is possible both for the chrominance signal and for the luminance signal. For ... | 01/13/1981 |
| 4220964 | Secam recording and reproducing system Apparatus for recording and/or reproducing a SECAM composite color television signal in parallel tracks on a record medium. The luminance and chrominance components of the SECAM television signal are separated from each other, and then the luminance compo... | 09/02/1980 |
| 4186411 | Recording and playback modulation method and apparatus Overlapping, minute regions of magnetization in a recording medium, which are produced during recording and cause distortion of the played back signal, are reduced by encoding the signal in a pulse signal. The time between pulses is varied according to th... | 01/29/1980 |
| 4178606 | Color video signal recording and/or reproducing system A color video signal recording system frequency modulates a luminance signal separated from an input color video signal. A first signal processing means converts the frequency of the carrier chrominance signal separated from the input color video signal. ... | 12/11/1979 |
| 4177481 | Magnetic recording and/or reproducing apparatus with chrominance crosstalk elimination In recording periodic information signals having first intervals and second intervals which are subdivisions of the first intervals, for example, the chrominance components of color video signals having field and line intervals, and which are recorded in ... | 12/04/1979 |
| 4165518 | Video signal recording and/or reproducing apparatus In apparatus for recording and/or reproducing video signals in successive parallel tracks on a record medium, and in which at least a portion of the video signals, for example, the luminance component of color video signals, is recorded as a frequency mod... | 08/21/1979 |
| 4143396 | Digital chrominance separating and processing system and method A digital chrominance separating and processing system which minimizes the effects of the inherent incomplete separation of the chrominance and luminance signals at the color edges of a television picture, when attempting to reproduce both frames of a com... | 03/06/1979 |
| 4134126 | Color recorder having means for reducing luminance crosstalk in displayed image A method of and apparatus for recording a video signal in successive parallel tracks on a record medium, and for reproducing the recorded signal. The video signal, which may be the luminance component of a composite color television signal, frequency modu... | 01/09/1979 |
| 4079412 | Signal processing circuit in a color video signal recording and/or reproducing apparatus A signal processing circuit is used in a color video signal recording and/or reproducing apparatus. The frequency of an original carrier chrominance signal is separated from an input color video signal and is converted into a low frequency band and/or rec... | 03/14/1978 |
| 4055848 | Signal processing for off-air video recorder An off-the-air color video recorder employs frequency interleaved chroma and luminance signal information for purposes of bandwidth compression. During playback, a shooting gallery picture defect characterized by motion along horizontal scene edges was no... | 10/25/1977 |
| 4012771 | Apparatus for recording and/or reproducing color video signals In apparatus for reproducing color video signals recorded in successive parallel tracks on a record medium with the chrominance components of video signals recorded in next adjacent tracks having first and second carriers which differ from each other in r... | 03/15/1977 |
| 3939485 | Magnetic recording and/or reproducing system In a system in which the polarity of the frequency converted chrominance signal or carrier is reversed during alternate lines of alternate fields recorded on alternate tracks on a recording medium and not reversed during the lines that make up the remaini... | 02/17/1976 |
