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
Discharge circuit and method
Systems and methods for programming an RFID reader
Case for electronic device
System and method for discontinuous reception control start time
Passive translational velocity measurement from optical information
Calibration device and related method for phase difference between data and clock
Depth estimation apparatus and method
  Randomly Featured Patents
Engine cooling system for outboard engine
Side door collision detecting system and occupant protecting system
Reciprocating slat conveyor
Synthesis of a crystalline silicoaluminophosphate
Piezoelectric polymer rectangular flexural plate hydrophone
Belt buckle
Method for producing insulin analogs having a dibasic B chain terminus
Reel with drum center support ring
Methods of forming magnetic memory devices
Metallic pigment preparation in compacted form, method for producing the same and use thereof