Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Business
Class Information
Number: 434/341
Name: Education and demonstration > Question or problem eliciting response > Correctness of response indicated to examine by self-operating or examinee actuated means > By means including electrical component > Part of electric circuit completed when examinee places free element in contact with another element > Correct answer indicator lamp carried by free element
Description: Subject matter wherein the free element includes an indicator lamp as a part thereof, the lamp being illuminated upon the closing of the electric circuit to thereby indicate a correct response.










Patents under this class:

Patent Number Title Of Patent Date Issued
D474109 Connector for use in packaging aerosol containers May. 6, 2003
4868374 Self-contained detector device for checking information recorded on a carrier Sep. 19, 1989
4557694 Teaching device and method of using same Dec. 10, 1985
4323243 Electrical board game device Apr. 6, 1982
4306870 Contact-actuated light pencil Dec. 22, 1981
4194302 Answer-spotting electric instrument Mar. 25, 1980
4183152 Electrical indicating device Jan. 15, 1980
4115931 Individualized teaching system utilizing electrical continuity Sep. 26, 1978











 
 
  Recently Added Patents
Identification of protected content in e-mail messages
Integrated circuits with magnetic core inductors and methods of fabrications thereof
Hedge shear
System and method for leveraging independent innovation in entertainment content and graphics hardware
Apparatus and method for masking a clock signal
Method of hydrothermal liquid phase sintering of ceramic materials and products derived therefrom
Synergistic preparations based on mixtures of glycerol ether with aromatic alcohol for controlling mycobacteria
  Randomly Featured Patents
Lighting device having a light blocking mechanism
Watch bezel and casing
Method and apparatus for encoding mode signals for use in a binary shape coder
Method of producing conjugated diene polymers
Synchronized code recognition
Digital data reproducing apparatus
Cache memory device and reference history bit error detection method
Organizational tools on a multi-touch display device
Dual-chamber injection cartridge
Grounding fault circuit interrupter