Sharp Kabushiki Kaisha Corporation

Koichi Hatta

Kenichiro Komeda

Yutaka Ikemoto

Yasuhiro Nakanishi

Koichi Oda

Yoshiro Kataoka

Toshihiko Sumitani

Akira Natsuhara

Takashi Sakaue

Megumi Fukusaki

An information protective device protects stored information such as a program, data or the like in an information processing apparatus such as small type of portable computer or the like. The information protective device comprises a prohibition condition storing portion, which stores the writing prohibition condition to a storage unit for programs, data or the like, and a prohibition condition setting means, which carries out the writing of prohibition instructions to be stored in the storing portion to set the writing prohibition condition, so that the storage unit may be handled like so-called read only memory (ROM), whereby the storing contents may be protected more positively.

Password system utilizing two password types, the first being changeable

An electronic apparatus such as a compact computer stores a certain set of information which is useful in its operation such as a list of character codes and corresponding characters or the names of commands that can be used and the methods of using them. Such information can be displayed by entering a specified command or a character string with one or more characters, including a help requesting key.

Display system for a compact electronic apparatus

A programmable calculator using at least one exchangeable reloadable memory module includes a connector for connecting the exchangeable reloadable memory module to the calculator. The calculator judges whether a program including information to execute said program is present in said exchangeable reloadable memory module, and inhibits erasure of the information to execute the program when presence of the program in the exchangeable reloadable memory module is judged by the calculator at the time of initialization of the programmable calculator.

Programmable calculator with external memory module and protection

A text compiling device includes a first memory area for storing an intervening code program in which a statement or comment is given by a code. The intervening code is read out and is converted to an ASCII code program. The converted ASCII code program is stored in a second memory area, which partly overlaps with the first memory area. Similarly, a reverse conversion can be carried out.

Text compiling device

A compact-size computer such as a functional calculator or a pocket computer selects either the sequential operation mode or formula memory mode according to the purpose of arithmetic operations and promotes faster and easier key operations. Specifically, it is substantially a calculator capable of executing formula calculations with different operational sequences wherein it comprises means for selecting and designating either the sequential operation mode that sequentially executes formula calculations according to individual key operations, or formula memory operation mode that executes operations after entry of the sequential operation mode.

Calculator or pocket computer with selectable operational sequence

An electronic game apparatus is included within an electronic calculator or the like and includes a display, game key elements of a shift key and a shot key, and a CPU. The display utilized is the display of an electronic calculator and shows one or more target symbols such as digits, and its corresponding game indicia. The CPU is operated to shift the figure position of the one or more target symbols and the game indicia. The CPU is responsive to the actuation of the shift key for shifting the figure position of the one or more target symbols and the game indicia, so as for the game indicia to follow the figure position of the one or more target symbols. The CPU is further responsive to the actuation of the shot key for shooting the one or more target symbols with the game indicia to thereby erase the display of the one or more target symbols.

Electronic game apparatus

A graph drawing machine adapted to print numeric data in graph form when the numeric data are inputted and a graph-printing instruction is given. Through a selection operation by the graph type selection switches, a given graph type is selected, and simultaneously one graph format or two or more formats, predetermined as suitable for the graph type selected, are adapted to be automatically set.

Graph-drawing machine

An electronic timepiece is disclosed which simplifies operations otherwise needed for executing a variety of functions. The electronic timepiece is characterized in that any desired alarm message may be activated by an extremely simple key operation. In addition, the alarm message timepiece can automatically set time data corresponding to respective alarm messages all at once when a battery is loaded therein.

Multi-alarm timepiece with simplified operating means

Disclosed is a check calculator as a preferred embodiment of the present invention, which is characterized in that;

Check calculator

The present invention discloses a shopping calculator into the budget memory of which, when shopping, a previously decided budget value is entered for storage by means of a budget key, and each time a purchase is made the cost of the purchase is entered into budget memory by means of DATA ENTRY keys and subtracted from the value in the budget memory, and when the remainder is below a preset value or when the budget value is exceeded, a warning is be given. In addition, another embodiment of the present invitation discloses a shopping calculator having a multiple symbol display unit, a means for carrying out comparative shopping calculations by which the prices and weights of at least two Commodities may be compared to determine which of the two is the better bargain, and a means by which the input values for the abovementioned comparative shopping calculations may be displayed, in order, in the abovementioned symbol display units.

Shopping calculator with comparison feature

An electronic learning aid includes a circuit for automatically developing problems, a display for displaying the problems, an input for introducing a calculated answer, and a determination circuit for detecting whether the introduced answer is correct. The display includes a first display unit of plural digits for displaying the problems, and a second display unit of plural digits for displaying the problem number, the score, the correct answer number, and the exercise number.

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Yamatokoriyama, Japan

Koichi Hatta