Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Communications
Class Information
Number: 181/69
Name: Acoustics >
Description:










Sub-classes under this class:

Class Number Class Name Patents
181/ Speaking tubes 0
181/.5 Miscellaneous 98
181/101 Geophysical or subsurface exploration 51
181/123 Echo system 10
181/125 Sound location 17
181/126 Anatomic or prosthetic relation 27
181/138 Mechanical telephone 6
181/139 Wave generation and detection 30
181/140 With vessel 16
181/141 Combined 150
181/142 Wave generation 62
181/143 Moving sound producer or deflector 13
181/144 Plural diaphragm sound sources 254
181/148 Diaphragm and enclosure 256
181/157 Diaphragm 75
181/175 Sound-modifying means 160
181/30 Auditorium 74
181/400 Wave coupling 19
181/403 Refrigerator compresssor muffler 195
181/404 Hobby craft engine muffler 5


Patents under this class:

Patent Number Title Of Patent Date Issued











 
 
  Recently Added Patents
Preparation and use of meristematic cells belonging to the Dendrobium phalaenopsis, Ansellia, Polyrrhiza, Vanilla, Cattleya and Vanda genera with high content of phenylpropanoids, hydrosoluble
Linerless labels
Portable reading device with mode processing
Display sheet, display device, and electronic apparatus
Plants and seeds of corn variety CV335662
Pressing mold for optical lenses and method for manufacturing glass optical lenses
Method of preparing enteric hard capsule and enteric hard capsule prepared thereby
  Randomly Featured Patents
Ski having a core comprising angled profiles
Gain control apparatus, optical transmission apparatus, gain control method for optical amplifier, and wavelength multiplex optical transmission system
Planetary gearing
Television set
Automatic drilling machine
Shoulder-launched multiple-purpose assault weapon
Heat exchanger
Releasable push-to-connect tube fitting
Die member for forming a lost foam pattern
Differential delay-line