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Electronic apparatus

  • US 5,331,555 A
  • Filed: 05/09/1991
  • Issued: 07/19/1994
  • Est. Priority Date: 05/11/1990
  • Status: Expired due to Term
First Claim
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1. A portable electronic text creation and storage device having a display with a limited display area and a keyboard with a limited number of keys corresponding to various text creation symbols for permitting an operator to create and store text in a hierarchy of text levels beginning with a highest hierarchical text level followed by one or more subordinate hierarchical text levels by selectively depressing the keys on the keyboard, comprising:

  • a text memory for storing strings of text data entered by the operator using the keyboard;

    a text management memory having a hierarchy field for each stored string of text data for storing a corresponding hierarchical text level and having a subordinate field for storing subordinate text information indicating whether a subsequent string of text data at a subordinate hierarchical text level exists;

    means for displaying on the display a first indicator near each displayed string of text data in accordance with the corresponding hierarchical text level and a second indicator near each displayed subordinate string of text data in accordance with the corresponding subordinate hierarchical text level;

    a selection key on the keyboard actuable by the operator for selecting a hierarchical text level; and

    means for storing in the text memory one or more strings of text data entered by the operator and for storing in the text management memory for each entered string of text data the selected hierarchical text level and subordinate text information indicating whether the entered string of text data is followed by a string of subordinate text data.

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