[54] ELECTRONIC WORLD CLOCK DEVICE FOR INDICATING TIMES FOR VARIOUS SPOTS IN THE WORLD
[75] Inventors: Yoshiro Kataoka, Sakurai; Shigenobu Yanagiuchi, Tenri; Yasuharu Tanaka; Yoshihiro Shintaku, both of Nara, all of Japan
[73] Assignee: Sharp Kabushiki Kaisha, Osaka,
Japan
[21] Appl. No.: 767,849
[22] Filed: Sep. 30,1991
Related U.S. Application Data
[63] Continuation of Ser. No. 579,273, Sep. 6, 1990, which is a continuation of Ser. No. 361,488, Jun. 2, 1989, abandoned.
[30] Foreign Application Priority Data
Jun. 3, 1988 [JP] Japan 63-138091
[51] Int. CI.* G04B 47/00; G04B 19/24;
G06F 15/40
[52] U.S. CI 368/10; 368/28;
368/43; 364/705.07; 364/709.16; 364/710.01
[58] Field of Search 368/10, 41-43,
368/82-84, 239-242; 340/706, 756; 364/569, 705.07, 705.08, 706, 709.01, 709.12, 709.16, 710.07, 710.1; 40/107, 110
[56] References Cited
U.S. PATENT DOCUMENTS
4,162,610 7/1979 Levine 368/10
4,270,192 5/1981 Kudo 368/29
4,303,995 12/1981 Aizawa 368/28
4,540,292 9/1975 Rubenstein et al 368/29
4,548,510 10/1985 Levine 368/10
4,591,840 5/1986 Curtis et al 340/706
4,626,836 12/1982 Curtis et al 340/706
4,630,934 12/1986 Arber 368/28
4,645,238 2/1987 Vincent et al 340/700
4,769,796 9/1988 Levine 368/29
4,831,552 5/1989 Scully et al 364/518
4.847.696 7/1989 Matsumoto et al 358/335
4,884,254 11/1989 Kawai et al. .
4.974.697 9/1988 Aihara 368/41
5,023,851 6/1991 Murray et al 368/41
5,070,470 12/1991 Scully et al 364/705
5,129,051 7/1992 Strope et al 340/706
FOREIGN PATENT DOCUMENTS
3520894 6/1984 Germany .
56-96283 8/1981 Japan .
59-58572 4/1984 Japan .
59-58573 4/1984 Japan .
61-89884 6/1986 Japan .
Primary Examiner—Vit W. Miska
[57] ABSTRACT
An electronic world clock device indicates a time in connection with a designated region based on a time difference in a reference region to be stored, and comprises clock means for counting a present time in a specified home region and memory means for storing various regions and names of the countries and the time differences corresponding to said various regions in the world, and said designated region and the name of the country where said designated region belongs are stored at the same time, so that said designated region as well as the name of the corresponding country and/or a time difference between two different regions in the world are indicated at the same time on the basis of the time difference in said reference region.
1 Claim, 16 Drawing Sheets
