Indicator apparatus for the recovery of skiers buried by avalanches

Patent 5172110 Issued on December 15, 1992. Estimated Expiration Date:

December 15, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

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Inventor

Tiefengraber, Armin

Application

No. 352114 filed on 05/15/1989

US Classes:

340/825.49, Location indication340/539.1, Radio340/539.26, Specific environmental sensor340/573.1, Human or animal342/22TRANSMISSION THROUGH MEDIA OTHER THAN AIR OR FREE SPACE

Examiners

Primary: Yusko, Donald J.
Assistant: Weissman, Peter S.

Attorney, Agent or Firm

Felfe & lynch

Foreign Patent References

2352807 DE. 04/13/1975
2425444 DE. 12/13/1975
2437464 DE. 02/13/1976
2437981 DE. 02/13/1976
2545066 DE. 04/13/1976
3109283 DE. 10/13/1982
3211381 DE. 10/13/1983
514897 CH. 12/13/1971
2082804 GB 06/13/1981

International Class

G01S 013/74

Foreign Application Priority Data

1988-05-20 DE

Abstract

Indicator apparatus used for recovery of skiers buried by avalanches, includes cooperating transmitters and receivers carried by skiers and by search and rescue personnel. The indicator device carried by a skier is actively powered and is combined to form a single unit with a ski pass.