United States Patent D797847

Zhang, Shi (Beijing, CN)
Application Number:
Publication Date:
Filing Date:
Zhang Shi
Primary Class:
International Classes:
(IPC1-7): 1907
Field of Search:
D19/59-64, D19/31, D18/6, 434/109, 434/188-189, 434/191-197, 434/200-205, 434/209-211, D21/337, D21/393, 273/260, 273/271, D10/46.1, D10/70, D28/67, D8/356, D7/699, D9/645, D6/306, 708/141, 235/123, D99/26
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US Patent References:
D759751Apple shaped bookJune, 2016JeremiahD19/31
D751918Puzzle boxMarch, 2016HojaibanD9/645
20130236864Use of colored beads in an augmented simple abacusSeptember, 2013Harte434/203
D680294Rosary prayer standApril, 2013BoyerD99/26
20120251986Abacus-type math teaching device and methodOctober, 2012Silas-Martin434/203
D656202Triangle strategy gameMarch, 2012FuchsD21/337
20120028229Augmented simple abacus with an underlying grid of numbers or a blank sheetFebruary, 2012Harte434/203
D641535Apple shaped coin bankJuly, 2011KanD99/37
D615828Apple shaped cutting boardMay, 2010ShamoonD7/699
20080280273Multipurpose AbacusNovember, 2008Lee434/203
D579352Dart score boardOctober, 2008BrodieD10/46.1
20070166673AbacusJuly, 2007Frieman434/203
20060228680Overhead abacusOctober, 2006Cotter434/188
D528405Apple shaped carabinerSeptember, 2006KelleghanD8/356
D513762AbacusJanuary, 2006Young434/203
D489971Apple shaped dispenserMay, 2004TamezD28/67
6712614Abacus calculatorMarch, 2004Henderson434/202
D433055Combined counting board and abacusOctober, 2000HanthornD18/6
5725380Combination writing board and abacusMarch, 1998Kennelly434/192
D390793Measuring and counting boardFebruary, 1998DeLong, Sr.D10/70
D370498Counting and alphabet teaching deviceJune, 1996KellyD19/60
D339754Domino scoreboardSeptember, 1993CranmerD10/46.1
5134692Combined electronic calculator and abacus with deflective guide barsJuly, 1992Hiromori708/141
4993952Arithmetic counterFebruary, 1991Yeh434/191
D313628Counting toyJanuary, 1991DelcambreD19/59
D313700Apple-shaped picture frameJanuary, 1991ZoldessyD6/306
4884973Mathematic teaching aidDecember, 1989Pak434/205
4812124Hexadecimal abacusMarch, 1989Colodner434/203
D284975Combined desktop abacus and electronic calculatorAugust, 1986KwokD18/6
D282669AbacusFebruary, 1986Conlee, Jr.D18/6
4340232Abacus chess gameJuly, 1982Shaw273/260
D249697Combined educational game board and counting board for teaching fundamentals of arithmeticSeptember, 1978HesterD19/59
D248332Combined domino holder and score counterJune, 1978BaileyD21/393
3982331Educational board gameSeptember, 1976Solomon273/271
3871114Device for teaching the addition of fractionsMarch, 1975Honig434/196
3731401ABACUS INSTRUCTION DEVICEMay, 1973Kojima434/203
3688418MANUAL COMPUTING DEVICESeptember, 1972Wilson434/203
3633287NUMERICAL BASE SYSTEMS TEACHING DEVICEJanuary, 1972Squires434/189
3508348MAGNETIC SOROBAN (ABACUS)April, 1970Harada Kogane434/203
3455034MATHEMATICS TEACHING TOOLJuly, 1969Schott434/203
3387392Abacus with mechanical means for holding unit counters in positionJune, 1968Kurz235/123
3381394Educational deviceMay, 1968Munro434/193
3151404AbacusOctober, 1964Schott235/123
3131488Apparatus for teaching mathematicsMay, 1964Slater434/195
3076272AbacusFebruary, 1963Schott434/203
2872742Abacus with magnetic means for holding unit counters in positionFebruary, 1959Schott434/203
D181754N/ADecember, 1957SchottD18/6
2655737AbacusOctober, 1953Don Dero434/203

Primary Examiner:
Simmons, Ian
Assistant Examiner:
Cavanna, Mark
Attorney, Agent or Firm:
Stratum Law LLC (150 Monument Road Ste. 207 Bala Cynwyd PA 19004)

1. The ornamental design for an abacus, as shown and described.


FIG. 1 is a front elevation view of the abacus showing my new design;

FIG. 2 is a back elevation view thereof;

FIG. 3 is a left elevation view thereof;

FIG. 4 is a right elevation view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a perspective view thereof; and,

FIG. 8 is another perspective view thereof.