Combined ruler, clock and solar cell calculator
United States Patent D284387

Li, Robert S. K. (2/F., Lee Kee Commercial Bldg., 233 Queen's Rd. Central, Hong Kong, HK)
Application Number:
Publication Date:
Filing Date:
Primary Class:
Other Classes:
D10/2, D10/15, D10/71, D18/7
Field of Search:
D18/2, D18/7-8, D18/11-12, D10/2, D10/15, D10/71, 33/125A, 33/484-485, 364/562, 364/706-710, 202/5A, 202/109B, 368/10
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US Patent References:
4530068Electronic hand-held memory deviceJuly, 1985Nakanishi364/706
D279381Calculator ruler or similar articleJune, 1985LeungD10/2
D271025Combined ruler and electronic calculatorOctober, 1983LiD18/2
4404643Portable electronic calculator with a writing instrumentSeptember, 1983Ojima364/708
4382280Electronic horse race analyzerMay, 1983Mandel364/710
4282571Electronic distance measurement and displaying apparatusAugust, 1981Giovannoli331/25A
D258740Electronic desk top calculatorMarch, 1981MatsumotoD18/7
4158229Electronic rule for precise distance measurement and distance settingJune, 1979Woo331/25A
D248995Electronic calculating machineAugust, 1978HazamaD18/7
D201300N/AJune, 1965SeelyD10/71
1334145RulerMarch, 1920EatonD10/71

Primary Examiner:
Holtje, Nelson C.
Attorney, Agent or Firm:
Ladas & Parry
1. The ornamental design for a combined ruler, clock and solar cellcalculator, as shown and described.


FIG. 1 is a top plan view of a combined ruler, clock and solar cell 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.