Radio frequency transponder method for identifying geographical

Details Radio frequency transponder method for identifying geographical Radio frequency transponder method for identifying geographical

1996-01-16

1998-10-20

Holloway, III, Edwin C.

Communications: electrical

Continuously variable indicating

With meter reading

34082549, 52103, 324329, G08B 522, G01V 308, E01F 9011

Patent

active

058252983

ABSTRACT:
An identification system including a device for locating land and construction survey traverse control points, other survey sites or any location marking the position of a place or thing comprised of a read only or read/write radio frequency transponder enclosed within a durable watertight container including a stake which may be driven into the earth, a read/write reader assembly and, a portable computer. The radio frequency transponder may be written to or read by a non-contacting radio frequency read/write reader assembly. The reader assembly connected to a portable computer through a data interface means such as RS232 or RS422/485. The stake or other container may be buried under any non-metallic material or otherwise not visible as long as it is within the operating range of the reader assembly. Each radio frequency transponder will have a unique identification code imprinted in its memory and, on the read/write transponders, may have additional information written into its memory. The reader assembly requires a 12 vdc power supply which may be self contained or an external battery pack. The transponder requires no power while in the standby non-excited state.

REFERENCES:
patent: 191919 (1877-06-01), Bonner
patent: 3503163 (1970-03-01), Lutz
patent: 3836842 (1974-09-01), Zimmermann et al.
patent: 4594559 (1986-06-01), Bernzweig
patent: 4864749 (1989-09-01), Brown
patent: 4890064 (1989-12-01), Candy
patent: 5214410 (1993-05-01), Verster
patent: 5430379 (1995-07-01), Parkinson et al.

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