Electronic identification system confirming valid code

Details Electronic identification system confirming valid code Electronic identification system confirming valid code

1997-11-24

1999-11-30

Holloway, III, Edwin C.

Communications: electrical

Continuously variable indicating

With meter reading

34082534, H04Q 700, G07C 900

Patent

active

059950170

ABSTRACT:
An identification system having an interrogator and a number of transponders. The interrogator includes a transmitter for transmitting an interrogation signal to the transponder, and a receiver for receiving a response signal from the transponder. A micro-processor identifies the transponder from data in the response signal. Each transponder includes a receiving antenna for receiving the interrogation signal, a code generator, a transmitting antenna, and a modulator connected to the code generator. On receipt of the interrogation signal the transponder repeatedly transmits a response signal containing data which identifies the transponder. The interrogator detects successful identification of any transponder and briefly interrupts the interrogation signal to indicate the successful identification. Each transponder includes a logic circuit responsive to a respective interruption in the interrogation signal to cease transmission of its own response signal.

REFERENCES:
patent: 3981011 (1976-09-01), Bell
patent: 4075632 (1978-02-01), Baldwin
patent: 4144534 (1979-03-01), Prickett et al.
patent: 4308530 (1981-12-01), Kip et al.
patent: 4495496 (1985-01-01), Miller, III
patent: 4614945 (1986-09-01), Brunius et al.
patent: 4631708 (1986-12-01), Wood et al.
patent: 4673932 (1987-06-01), Ekchian et al.
patent: 4680583 (1987-07-01), Grover
patent: 4691202 (1987-09-01), Denne et al.
patent: 4710752 (1987-12-01), Cordery
patent: 4818998 (1989-04-01), Aspell
patent: 4827110 (1989-05-01), Rossi
patent: 4862160 (1989-08-01), Ekchian et al.
patent: 4862176 (1989-08-01), Voles
patent: 4870391 (1989-09-01), Cooper
patent: 5008661 (1991-04-01), Raj
patent: 5036308 (1991-07-01), March
patent: 5081458 (1992-01-01), Meunier
patent: 5103222 (1992-04-01), Hogen Esch et al.
patent: 5105190 (1992-04-01), Kip et al.
patent: 5124699 (1992-06-01), Tervoert et al.
patent: 5150114 (1992-09-01), Johansson
patent: 5151684 (1992-09-01), Johnsen
patent: 5218343 (1993-06-01), Stobbe et al.
patent: 5221831 (1993-06-01), Geiszler
patent: 5239167 (1993-08-01), Kipp
patent: 5260690 (1993-11-01), Mann et al.
patent: 5381137 (1995-01-01), Ghaem et al.
patent: 5387900 (1995-02-01), Plonsky et al.
patent: 5519381 (1996-05-01), Marsh

Affiliated with

Also associated with

Rating

Electronic identification system confirming valid code does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electronic identification system confirming valid code, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electronic identification system confirming valid code will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1678384