Name Size Creator Creation Date Labels Comment  
PDF File 3387091.pdf 1.35 MB Shaun Ewing Jun 04, 1968 00:00
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US-3387091-A // Alarm system for telephone pay stations // Deiker Robert W. // American Telephone & Telegraph
PDF File 3389234.pdf 1.00 MB Shaun Ewing Jun 18, 1968 00:00
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US-3389234-A // Access control in telephone testing systems // Cotner J. Arthur // American Telephone & Telegraph
PDF File 3393274.pdf 297 kB Shaun Ewing Jul 16, 1968 00:00
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US-3393274-A // Subscriber loop and trunk loop range extension circuit // Ingraham Frank S. // American Telephone & Telegraph
PDF File 3398234.pdf 3.22 MB Shaun Ewing Aug 20, 1968 00:00
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US-3398234-A // Multiple address circuit // Thomas Robert L. // American Telephone & Telegraph
PDF File 3418455.pdf 944 kB Shaun Ewing Dec 24, 1968 00:00
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US-3418455-A // Matched mailing detection system // Rackliffe Leroy J. ; Rau Rodney G. // American Telephone & Telegraph
PDF File 3456240.pdf 2.55 MB Shaun Ewing Jul 15, 1969 00:00
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US-3456240-A // Method and arrangement for signaling in a remote control system // Bruce C. Hays // American Telephone & Telegraph
PDF File 3478174.pdf 554 kB Shaun Ewing Nov 11, 1969 00:00
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US-3478174-A // Call distributing circuit utilizing sequential activation of station ringers // Donald A. Macleod ; George P. Maddock // American Telephone & Telegraph
PDF File 3721887.pdf 393 kB Shaun Ewing Mar 20, 1973 00:00
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US-3721887-A // Battery protection circuit // Nickerson C,us // American Telephone & Telegraph
PDF File 3912874.pdf 1.98 MB Shaun Ewing Oct 14, 1975 00:00
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US-3912874-A // Conference arrangement // Botterell; John Joseph ; Dayton; Robert Lewis ; Guyler; James Raymond // American Telephone & Telegraph
PDF File 3914561.pdf 1000 kB Shaun Ewing Oct 21, 1975 00:00
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US-3914561-A // Apparatus and method for tracing jumpers in a main distributing frame // Schardt; Courtney Harold ; Schepis; Albert James // American Telephone & Telegraph
PDF File 3980840.pdf 764 kB Shaun Ewing Sept 14, 1976 00:00
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US-3980840-A // Conductor identification arrangement for a cable restoration system // Koster; Frederick Henry // American Telephone And Telegraph Company
PDF File 4020295.pdf 489 kB Shaun Ewing Apr 26, 1977 00:00
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US-4020295-A // Rotary dial restriction circuit // Vuotto; Edward Joseph // American Telephone And Telegraph Company
PDF File 4027104.pdf 1.08 MB Shaun Ewing May 31, 1977 00:00
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US-4027104-A // Arrangement for automatically generating alternate telephone station identification codes // Levitt; Arthur Paul ; Oakley; Robert Vincent ; Patterson; Roy Earl // American Telephone And Telegraph Company
PDF File 4093826.pdf 664 kB Shaun Ewing Jun 06, 1978 00:00
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US-4093826-A // Tone signaling conversion apparatus // Koster; Frederick Henry // American Telephone And Telegraph Inc.
PDF File 4112247.pdf 351 kB Shaun Ewing Sept 05, 1978 00:00
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US-4112247-A // Gas feeder pipe assembly including electrical conductors // Dembiak; Matthew R. ; Finnegan; John F. ; Reece; Thomas B. ; Rudolph, Jr.; Howard W. // Western Electric Company, Inc. ; American Telephone & Telegraph Co., Inc.
PDF File 4165446.pdf 352 kB Shaun Ewing Aug 21, 1979 00:00
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US-4165446-A // Data transmission systems (using internal systems equipment, services and procedures of telephone companies) // Flowers; Thomas E. ; Macdonnell; Gordon S. // Flowers Thomas E ; Macdonnell Gordon S
PDF File 4175271.pdf 606 kB Shaun Ewing Nov 20, 1979 00:00
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US-4175271-A // Helical video tape insert recording editing method with flying erase head and servo control // Kaemmerer, Harry // American Telephone And Telegraph
PDF File 4395594.pdf 784 kB Shaun Ewing Jul 26, 1983 00:00
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US-4395594-A // Method and apparatus for forcing randomization of idle channel seizures // Meyerle; John A. // Bell Telephone Laboratories, Incorporated
PDF File 4464650.pdf 5.99 MB Shaun Ewing Aug 07, 1984 00:00
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US-4464650-A // Apparatus and method for compressing data signals and restoring the compressed data signals // Eastman; Willard L. ; Lempel; Abraham ; Ziv; Jacob ; Cohn; Martin // Sperry Corporation
PDF File 4467523.pdf 1.83 MB Shaun Ewing Aug 28, 1984 00:00
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US-4467523-A // Methods of and apparatus for inserting pins into a substrate // Chisholm; William M. // At&t Technologies, Inc.
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