The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 1980
Filed:
Jul. 26, 1976
Herman W Harrison, Dallas, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
Disclosed is an electronic calculator having a data entry unit for inputting numeric data, expressions such as parentheses and hierarchal mathematical commands, an arithmetic unit for performing arithmetic operations on the numeric data, a memory for storing the numeric data and associated hierarchal mathematical commands inputted via the data entry unit and logic circuitry for enabling the arithmetic unit to perform arithmetic operations on numeric data inputted via the data entry unit within a pair of parentheses, the logic circuitry enabling the arithmetic unit to perform a higher order hierarchal mathematical command before a lower order hierarchal command eventhough the higher order command is received after the lower order hierarchal mathematical command.