Resources Contact Us Home
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
Flexible circuit routing
Engineered enzymes with methionine-gamma-lyase enzymes and pharmacological preparations thereof
Method of making an array of nucleic acid colonies
Image forming apparatus with enhanced display of guidance information
Method and device for the detection of defects or correction of defects in machines
Systems and methods for generating customized user interfaces
Profiling activity through video surveillance
  Randomly Featured Patents
Interdental brush and method of producing the same
Boot hanger
Multilayer inductor component
Method of packaging electronic components
Method to fabricate metallic containers by electroplating for use in hot isostatic pressing of metallic and/or ceramic powders
Surgical draping system for a patient on an operating table and an adjacent movable medical tool and related methods
Reel-to-reel substrate tape polishing system
Compositions of pyrithione metal salts and undecylenic acid alkylolamide derivatives
Viaduct for a railway line or the like
Remote access server using files containing generic and specific music data for generating customized music on demand