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Class Information
Number: 283/44
Name: Printed matter > Mathematics
Description: The indicia pertain to the science of numbers.

Patents under this class:

Patent Number Title Of Patent Date Issued
8562024 Number writing development guide Oct. 22, 2013
8289579 Variable guilloche and method Oct. 16, 2012
7494471 Moon phase menstrual tracking and educational system Feb. 24, 2009
6217074 Method and system for generating, storing and managing records Apr. 17, 2001
4903990 Problem sheet for self-evaluated mathematics examination Feb. 27, 1990
4537111 System for aiding note transpositions for stringed instruments Aug. 27, 1985
4419081 Mathematical teaching/learning aid and method of use Dec. 6, 1983
4369359 Apparatus and method for calculating break-even point of enterprise Jan. 18, 1983
4369358 Table correlating device for scuba divers Jan. 18, 1983
4283872 Adjustable display device Aug. 18, 1981
4251093 Restaurant checks Feb. 17, 1981
4221326 Calculator for comparative product investment recovery Sep. 9, 1980
4144446 Biorhythm calculator Mar. 13, 1979
4120186 Multi-die/block drawing machines Oct. 17, 1978
4035616 Device for the joint evaluation of several cyclic processes Jul. 12, 1977

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