| 摘要 |
THE PRESENT INVENTION RELATES TO A HAND-HELD CALCULATING DEVICE FOR CALCULATING INCOME TAXES OR THE LIKE INCLUDES SUBSTANTIALLY FLAT, ELONGATE FRON AND REAR COVER MEMBERS AND A MOVABLE MEMBER. SUITABLE STRUCTURE IS PROVIDED FOR JOINING THE COVER MEMBERS WITH THE MOVABLE MEMBER SLIDABLY INSERTABLE THERE BETWEEN.THE MOVABLE MEMBER CARRYING A PLURALITY OF COLUMNS ON BOTH FRONT AND REAR SIDES THEREOF, EACH COLUMN CARRYING A PLURALITY OF LINES OF TAXS OR THE LIKE. AT LEAST ONE THROUGH APERTURES OR OPENINGS ARE PROVIDED ON BOTH FRONT AND REAR COVER MEMBERS FOR VIEWING SELECTED LINES AND COLUMNS OFS ON THE MOVABLE MEMBER. THE SAID INVENTION PROVIDES AN INEXPENSIVE INCOME TAXES CALCULATING DEVICE OR MORE SPECIFICALLY INCOME TAX SELF ASSESSMENT CALCULATOR OF SIMPLE AND PRACTICAL CONSTRUCTION WHICH IS EFFICIENT AND RELIABLE IN OPERATION AND OTHERWISE WELL ADAPTED FOR THE PURPOSE FOR WHICH THE SAME IS INTENDED.
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