Combined ruler, clock and calculator
Description
FIG. 1 is a top plan view of a combined ruler, clock and calculator, showing my new design;
FIG. 2 is a bottom plan view thereof;
FIG. 3 is a front elevational view thereof, the rear being substantially a mirror image thereto;
FIG. 4 is a right end elevational view thereof;
FIG. 5 is a left end elevational view thereof.
Referenced Cited
U.S. Patent Documents
D201300 | June 1965 | Seely |
D248995 | August 15, 1978 | Hazama |
D258740 | March 31, 1981 | Matsumoto |
D271025 | October 18, 1983 | Li |
D279381 | June 25, 1985 | Leung |
1334145 | March 1920 | Eaton |
4158229 | June 12, 1979 | Woo |
4282571 | August 4, 1981 | Giovannoli |
4382280 | May 3, 1983 | Mandel |
4404643 | September 13, 1983 | Ojima |
4530068 | July 16, 1985 | Nakanishi |
Patent History
Patent number: D284199
Type: Grant
Filed: Aug 2, 1983
Date of Patent: Jun 10, 1986
Inventor: Robert S. K. Li (Hong Kong)
Primary Examiner: Nelson C. Holtje
Law Firm: Ladas & Parry
Application Number: 6/519,557
Type: Grant
Filed: Aug 2, 1983
Date of Patent: Jun 10, 1986
Inventor: Robert S. K. Li (Hong Kong)
Primary Examiner: Nelson C. Holtje
Law Firm: Ladas & Parry
Application Number: 6/519,557
Classifications