Issued US Patents

  1. 9,660,729 Cable communication system optical nodes having selectable attenuation values to mitigate distortion of upstream information 
  2. 9,654,744 Frequency modulated burst mode transmitter and method 
  3. 8,949,918 Hybrid fiber-coaxial (HFC) cable communication systems having well-aligned optical and radio-frequency links to  facilitate upstream channel plans having high aggregate data capacity  
  4. 8,363,679 Clock synchronization in a bidirectional network
  5. 8,270,834 Frequency modulated burst mode optical system  
  6. 7,978,977 Frontend baseband digital reverse for a cable modem termination system  
  7. 7,933,288 Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service  
  8. 7,801,119 Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service  
  9. 7,614,074 Burst-mode digital transmitter  
  10. 7,519,081 Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service in local networks  
  11. 7,336,680 Multi-carrier frequency-division multiplexing (FDM) architecture for high speed digital service  
  12. 7,218,901 Automatic frequency control of multiple channels  
  13. 7,054,564 Open loop thermal compensation circuit that is suitable for use in burst-mode laser transmitters  
  14. 6,751,271 Detecting a carrier signal by using a power averaging circuit  
  15. 6,721,352 Method and device for detecting the presence of a carrier signal transmitted in the reverse RF path 
  16. 6,714,598 Burst-mode combining of reverse path radio frequency signals  
  17. 6,570,693 Reverse path optical combining using an optical commutator  
  18. 6,509,994 Burst-mode analog transmitter  
  19. 6,462,851 Network and method for transmitting reverse analog signals by sub-sampling the digital reverse bandwidth  
  20. 5,854,703 Hybrid fiber coax communications network  
  21. 5,505,901 CATV pay per view interdiction system method and apparatus  
  22. 5,467,397 Interdiction method and apparatus with variable dwell time  
  23. 5,463,689 Interdiction method and apparatus with random mode jamming  
  24. 5,436,822 Polarity reversing DC power supply for remotely located equipment  
  25. 5,345,504 Differential compensation control for off-premises CATV system
  26. 5,309,514 Pulse generator including a memory for storing pulses for modulation on a carrier of a television signal
  27. 5,303,295 Enhanced versatility of a program control by a combination of technologies  
  28. 5,289,541 Interdiction method and apparatus with constant blanking and variable dwell times  
  29. 5,287,539 Interdiction program denial system for jamming audio and video signals  
  30. 5,245,420 CATV pay per view interdiction system  
  31. 5,235,619 Cable television radio frequency subscriber data transmission apparatus and RF return method  
  32. 5,231,660 Compensation control for off-premises CATV system  
  33. 5,208,854 Picture carrier controlled automatic gain control circuit for cable television interdiction or jamming apparatus  
  34. 5,177,787 Scrambler with self-calibration  
  35. 5,155,590 System for data channel level control  
  36. 5,144,267 Variable slope network for off-premises CATV system  
  37. 5,142,575 Method and apparatus for improving video scrambling and employing split sync pulses  
  38. 5,142,574 Optimum amplitude and frequency of jamming carrier in interdiction program denial system  
  39. 5,109,286 CATV reverse path manifold system  
  40. 5,068,893 Television signal processing network for subscription television jamming signals  
  41. 5,045,816 Binary phase shift key modulator with programmable level control  
  42. 5,014,309 Off-premises cable television channel interdiction method and apparatus  
  43. 4,963,966 CATV distribution system, especially adapted for off-premises premium channel interdiction  
  44. 4,924,498 Method and apparatus for improving video scrambling and employing split snyc pulses  
  45. 4,912,760 Off-premises cable television channel interdiction method and apparatus  
  46. 4,748,667 Jamming signal scrambling and descrambling systems for CATV  
  47. 4,692,919 Communications network