US Patent Class 348
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Current as of: June, 1999
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CLASS NOTES
1  DF  USE SURVEY AND ACCOUNTING {4}
5.5  DF  USE OR ACCESS BLOCKING (E.G., LOCKING SWITCH)
6  DF  WIRED BROADCAST (E.G., CABLE) {5}
13  DF  TWO-WAY (E.G., INTERACTIVE) {1}
21  DF  PLURAL TRANSMITTER SYSTEM CONSIDERATIONS (E.G., INTERFERENCE REDUCTION)
22  DF  SLOW SCANNING TRANSMISSION (E.G., STILL FRAME) {1}
24  DF  PLURAL STILL IMAGES OVER CONVENTIONAL CHANNEL
25  DF  IMAGE FALSIFICATION TO IMPROVE VIEWER PERCEPTION OF SELECTIVE OBJECT (E.G., MOVING OBJECT OR TARGET) {4}
31  DF  BACK SCATTER REDUCTION
32  DF  PSEUDO COLOR {2}
35  DF  PSEUDO BLACK AND WHITE
36  DF  PANORAMIC {3}
40  DF  HOLOGRAPHIC {1}
42  DF  STEREOSCOPIC {5}
61  DF  SPECIAL APPLICATIONS {15}
162  DF  RESPONSIVE TO NONVISIBLE ENERGY {2}
169  DF  OBJECT TRACKING {2}
173  DF  CATHODE-RAY TUBE BURN-IN PREVENTION {1}
175  DF  CAMERA WITH BUILT-IN TEST SIGNAL GENERATOR, TEST PATTERN, OR ADJUSTING ADJUNCT {1}
177  DF  DISPLAY OR RECEIVER WITH BUILT-IN TEST SIGNAL GENERATOR, TEST PATTERN, OR ADJUSTING ADJUNCT {1}
180  DF  MONITORING, TESTING, OR MEASURING {6}
195  DF  MECHANICAL OPTICAL SCANNING {6}
206  DF  SPECIAL SCANNING (E.G., SPIRAL, RANDOM, ZIGZAG)
207  DF  CAMERA, SYSTEM AND DETAIL {19}
377  DF  CATHODE-RAY TUBE DISPLAY EXCESSIVE VOLTAGE CONTROL {1}
379  DF  CATHODE-RAY TUBE DISPLAY AUTOMATIC BLACK LEVEL BIAS CONTROL
380  DF  CATHODE-RAY TUBE DISPLAY BEAM CURRENT CONTROL {1}
383  DF  MODULAR IMAGE DISPLAY SYSTEM
384  DF  BANDWIDTH REDUCTION SYSTEM {7}
441  DF  FORMAT CONVERSION {9}
460  DF  DIVERSE DEVICE CONTROLLED BY INFORMATION EMBEDDED IN VIDEO SIGNAL
461  DF  NONPICTORIAL DATA PACKET IN TELEVISION FORMAT {7}
469  DF  FORMAT {6}
497  DF  FLUTTER OR JITTER CORRECTION (E.G., DYNAMIC REPRODUCTION) {1}
500  DF  SYNCHRONIZATION {11}
552  DF  COMBINED WITH DIVERSE ART DEVICE (E.G., COMPUTER, TELEPHONE)
553  DF  BASIC RECEIVER WITH ADDITIONAL FUNCTION {4}
571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
722  DF  STUDIO EQUIPMENT
723  DF  TELEVISION TRANSMITTER CIRCUITRY {1}
725  DF  RECEIVER CIRCUITRY {10}
739  DF  VIDEO DISPLAY {13}
844  DF  MISCELLANEOUS
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CROSS-REFERENCE ART COLLECTIONS
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901  DF  HIGH SPEED TELEVISION SYSTEM
902  DF  PHOTOCHROMIC
903  DF  INCLUDING SIDE PANEL INFORMATION IN SINGLE CHANNEL
904  DF  SEPARATION OR JOINING OF SIDE AND CENTER PANELS
905  DF  REPRODUCTION OF A COLOR FIELD OR FRAME
906  DF  TELEVISION SCHEDULE
907  DF  COMMERCIAL VERIFICATION
908  DF  CONVERTIBLE CIRCUITS (E.G., Y/C SEPARATION OR NOISE REDUCTION)
909  DF  NOISE RESPONSIVE SIGNAL PROCESSING
910  DF  FLICKER REDUCTION
911  DF  LINE DOUBLER ADAPTED FOR REPRODUCING PROGRAM ORIGINALLY FROM FILM (E.G., 24 FRAME PER SECOND)
912  DF  DIFFERENTIAL AMPLITUDE CONSIDERATION (E.G., AMPLITUDE VS. FREQUENCY)
913  DF  LETTERBOX (E.G., DISPLAY 16:9 ASPECT RATIO IMAGE ON 4:3 SCREEN)
914  DF  DELAY FOR EQUALIZATION