(19)
(11) EP 0 554 346 A1

(12)

(43) Date of publication:
11.08.1993 Bulletin 1993/32

(21) Application number: 91919592.0

(22) Date of filing: 21.10.1991
(51) International Patent Classification (IPC): 
G01B 17/ 00( . )
G06F 3/ 00( . )
G06F 3/ 033( . )
G06F 3/ 043( . )
 G01S 5/ 18( . )
G06F 3/ 01( . )
G06F 3/ 041( . )
G06F 3/ 048( . )
(86) International application number:
PCT/US1991/007795
(87) International publication number:
WO 1992/007346 (30.04.1992 Gazette 1992/10)
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 22.10.1990 US 19900601942
29.07.1991 US 19910737074

(71) Applicant: LOGITECH INC
Fremont California 94555 (US)

(72) Inventors:
  • EDWARDS, Bruce
    Santa Clara, CA 05054 (US)
  • GLICKMAN, David
    Baltimore, MA 21209 (US)
  • BARNES, James
    Campbell, CA 95008 (US)
  • McCLURE, Ron
    Oakland, CA 94607 (US)

(74) Representative: Reverdin, André Pierre 
c/o Katzarov S.A. 19, Rue des Epinettes
CH-1227 Genève
CH-1227 Genève (CH)

   


(54) ULTRASONIC POSITION LOCATING METHOD AND APPARATUS THEREFOR