Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Business
Class Information
Number: 434/199
Name: Education and demonstration > Mathematics > Arithmetic > Plaque slidable relative to index (e.g., window in card, etc.) to selectively align different points on plaque therewith
Description: Subject matter including a first stiff sheet or board translatable relative to a pointer, an aperture in a second stiff sheet or board, or other indexing means so that various points on the first sheet or board can be brought into register with said pointer, aperture in said second sheet or board, or other indexing means as desired.










Patents under this class:

Patent Number Title Of Patent Date Issued
8317522 Hormonal quotient profile calculator Nov. 27, 2012
8267691 Threat fire simulation and training system Sep. 18, 2012
6716033 System for teaching mathematics Apr. 6, 2004
6079983 Educational instrument for numbers Jun. 27, 2000
5820382 Multifilication quizzer Oct. 13, 1998
5518409 Sliding digital bookmarker May. 21, 1996
5407356 Pictorial image transforming manipulative-with multiple channel tracks Apr. 18, 1995
5277587 Learning toy Jan. 11, 1994
4915634 Visual and manipulative teaching aid for mathematics Apr. 10, 1990
4856998 Teaching aids Aug. 15, 1989
4372742 Arithmetical teaching aid Feb. 8, 1983
4241522 Teaching aid Dec. 30, 1980
4185401 Arithmetic game board Jan. 29, 1980











 
 
  Recently Added Patents
Method of and apparatus for evaluating an optimal irradiation amount of an electron beam for drawing a pattern onto a sample
(4929
MRAM with sidewall protection and method of fabrication
Identification wristband
Compositions and methods for concentrating and depleting microorganisms
Three-term predictive adder and/or subtracter
Stacked thin-film superlattice thermoelectric devices
  Randomly Featured Patents
Switched reluctance motor regulation
Switch meshing using multiple directional spanning trees
Method and system for processing financial instrument deposits physically remote from a financial institution
Modified sealing machine
Device for tightening bolts
Optical linked remote control video game apparatus
Fiber optic computational network utilizing optical and/or gate employing non-linear organic polymers and photovoltaic/piezoelectric optical interfaces
Deformable orthosis
ELECTROPHOTOGRAPHIC PHOTOCONDUCTOR, IMAGE FORMING METHOD AND APPARATUS, AND PROCESS CARTRIDGE USING THE PHOTOCONDUCTOR, AND LONG-CHAIN ALKYL GROUP CONTAINING BISPHENOL COMPOUND AND POLYMER MAD
TET-LCD method for manufacturing the same