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
Filtering method for improving the data quality of geometric tire measurements
Method and apparatus for managing backup channel in multi-channel environment
Surfcraft fin
System, method and computer program product for efficient caching of hierarchical items
Magnesium metal-air battery
Peptide vectors
Post-processing device and image forming system
  Randomly Featured Patents
Top work feeding arrangement for a chain stitch sewing machine
Mid-life vaccine and methods for boosting anti-mycobacterial immunity
Prosthesis for bridging a vertebral body
Method of forming floating gate array of flash memory device
Magnetic tape recording and reproducing apparatus for digital signals of still pictures in the pal system
Filter interconnection matrix
Luminaire
Chemical process
RF simulcasting system with dynamic wide-range automatic synchronization
Window component extrusion