Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 116/151
Name: Signals and indicators > Bells > Pneumatic actuation
Description: Bells in which pneumatic means are used for moving the bell or controlling its motion.










Patents under this class:

Patent Number Title Of Patent Date Issued
7640883 Fluid-operated communication system Jan. 5, 2010
4275681 System gas alarm Jun. 30, 1981
4269878 Stand structure May. 26, 1981











 
 
  Recently Added Patents
Techniques for determining optimized local repair paths
Method for culturing lactic acid bacterium and method for producing fermented milk
Lipoprotein analysis by differential charged-particle mobility
Sign language keyboard and sign language searching apparatus using the same
Emergency whistle, flashlight, and compass
Wound dressings
Scalable packet processing systems and methods
  Randomly Featured Patents
Rapid plasticization of quenched yarns
Fuel injector tip autofrettage process
Cosulfurized products of high iodine valve triglyceride and nonwax ester of monoethenoid fatty acid as lubricant additives
Mounting system for a video control unit
Method for separation of reaction products from catalysts
Method for detecting discriminatory data patterns in multiple sets of data and diagnosing disease
Spindle motor having aligning mechanism and information recording/reproducing apparatus mounted with such spindle motor
Infinitely variable transmission utilizing hydraulic fluid pressure to vary velocity ratio between driving and driven pulleys
Electronic apparatus and computer readable medium recorded voice operating program
Vacuum fluorescent display system, digital power supply