Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 116/153
Name: Signals and indicators > Bells > Gong type > Door knob contained
Description: Devices in which the bell is placed within a hollow doorknob or itself forms the knob.










Patents under this class:

Patent Number Title Of Patent Date Issued
7623024 Adjustable door chime with interchangeable parts Nov. 24, 2009
6028504 Removable door chime Feb. 22, 2000
5914650 Removable door chime Jun. 22, 1999
4800833 Tubular door lock with a bell Jan. 31, 1989
4577584 Bell lock (II) Mar. 25, 1986











 
 
  Recently Added Patents
Method and system of channel detecting and reporting, terminal, and management center
Method and apparatus for disease diagnosis and screening using extremely low frequency electromagnetic fields
Flat panel crystal display employing simultaneous charging of main and subsidiary pixel electrodes
Use of a high-oleic and high-tocol diet in combination with a non-tocol antioxidant for improving animal meat quality
Method and system for electronic distribution of product redemption coupons
Superconducting magnetizer
Sampling switch circuit that uses correlated level shifting
  Randomly Featured Patents
Method and apparatus for evaluating myoelectric signals and identifying artifact
Flexible LED lighting strips including overmolding encasement and attached parallel electrical conductors
Display device
Surgical stapling instrument
Control information transmitting method, transmitter, and transmitting and receiving apparatus
Magnetic disk drive having voice coil motor for moving a carriage and rocking mechanism for locking the carriage
Air heater with automatic sealing
Synchronized sounding/flashing circuit
Seasonal control skylight glazing panel with passive solar energy switching
Pulse control device