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
Restore software with aggregated view of content databases
Laser processing method and apparatus
Anti-phishing system and method
Method and system for detecting data modification within computing device
Hydrothermal synthesis of nanocubes of sillenite type compounds for photovoltaic applications and solar energy conversion of carbon dioxide to fuels
Methods and apparatus for adapting network characteristics in telecommunications systems
Method for building taxonomy of topics and categorizing videos
  Randomly Featured Patents
Glass cutting
Homogeneous assays using avidin-binding azo reagents
Hinged closure device and a container
Iron-based powder mixture and method
Derivatives of 1-(3-cyano-3,3-diphenylpropyl)-4-phenylpiperidine-4-carboxylic acid
Non-swirl dry low NOx (DLN) combustor
Toy building element
Multi-axis force platform
Spin-valve type magnetoresistance sensor and thin-film magnetic head
Slide fastener-operated top hood for trucks