Click to skip top of page links USPTO IntranetIntranet HomeIndexResourcesContactsInternetSearch
Patent Intranet > Classification Home Page > Classification Search Page > Classification Schedule with Indent Level
Site Feedback
 
   Search Classification Data | Class Numbers & Titles | Class Numbers | USPC Index  | International  | HELP  | Employee by Name  | Employees by Org       

 Class   181ACOUSTICS
  Click here to view a PDF version of this file
  .5           MISCELLANEOUS
             SPEAKING TUBES
  18           . (1 indent ) Systems
  19           . (1 indent ) Alarms and indicators
  20           . (1 indent ) Combined mouth and ear pieces
  21           . (1 indent ) Mouthpieces
  22           . (1 indent ) Tubes
  30           AUDITORIUM
  101           GEOPHYSICAL OR SUBSURFACE EXPLORATION
  102           . (1 indent ) Well logging
  103           .. (2 indent ) Programmed or timer-controlled
  104           .. (2 indent ) Directional source or detector
  105           .. (2 indent ) Bore hole or casing condition
  106           .. (2 indent ) Seismic wave generation
  107           . (1 indent ) Programmed or timer-controlled
  108           . (1 indent ) Seismic source and detector
  109           .. (2 indent ) Aerial
  110           .. (2 indent ) Underwater
  111           .. (2 indent ) Plural sources
  112           .. (2 indent ) Plural detectors
  113           . (1 indent ) Seismic wave generation
  114           .. (2 indent ) Vehicle-mounted
  115           .. (2 indent ) Bubble suppression or control
  116           .. (2 indent ) Explosive
  117           ... (3 indent ) Gas
  118           .... (4 indent ) Underwater
  119           .. (2 indent ) Fluid means
  120           ... (3 indent ) Underwater
  121           .. (2 indent ) Moving weight
  122           . (1 indent ) Seismic wave detection
  123           ECHO SYSTEM
  124           . (1 indent ) Altitude or depth detection
  125           SOUND LOCATION
  126           ANATOMIC OR PROSTHETIC RELATION
  127           . (1 indent ) Dentiphone
  128           . (1 indent ) Ear and mouth
  129           .. (2 indent ) Ear
  130           .. (2 indent ) Auditory canal insert
  131           ... (3 indent ) Stethoscope
  132           ... (3 indent ) With diaphragm
  133           ... (3 indent ) Deflector type
  134           ... (3 indent ) Eardrum
  135           ... (3 indent ) Ear insert
  136           .. (2 indent ) Deflector type
  137           .. (2 indent ) Receiver
  138           MECHANICAL TELEPHONE
  139           WAVE GENERATION AND DETECTION
  140           WITH VESSEL
  141           COMBINED
  142           WAVE GENERATION
  143           MOVING SOUND PRODUCER OR DEFLECTOR
  144           PLURAL DIAPHRAGM SOUND SOURCES
  145           . (1 indent ) Plural chambers
  146           . (1 indent ) With sound-asborbing means
  147           . (1 indent ) Three diaphragms
  148           DIAPHRAGM AND ENCLOSURE
  149           . (1 indent ) Moisture proof
  150           . (1 indent ) Recessed (e.g., wall-mounted, etc.)
  151           . (1 indent ) With sound-absorbing means
  152           . (1 indent ) With horn
  153           . (1 indent ) Rounded enclosure (e.g., curved, etc.)
  154           . (1 indent ) Inclined diaphragm
  155           . (1 indent ) Reflector baffle
  156           . (1 indent ) Reflex baffle
  157           DIAPHRAGM
  158           . (1 indent ) Microphone type
  159           . (1 indent ) With horn
  160           . (1 indent ) With resonant chamber
  161           . (1 indent ) With direct mechanical connection to drive unit
  162           .. (2 indent ) Stylus bar
  163           . (1 indent ) Plural dependent diaphragms
  164           . (1 indent ) Sectional diaphragm
  165           .. (2 indent ) Concentric annular section
  166           . (1 indent ) With damping means
  167           . (1 indent ) Critically defined material or coating
  168           .. (2 indent ) Metallic material
  169           .. (2 indent ) Fibrous material
  170           .. (2 indent ) Laminated type
  171           . (1 indent ) Mounting or suspension means
  172           .. (2 indent ) Elastic suspension means
  173           . (1 indent ) Particular shape
  174           .. (2 indent ) Variable thickness
  175           SOUND-MODIFYING MEANS
  176           . (1 indent ) Lens
  177           . (1 indent ) Intensifying horn
  178           .. (2 indent ) Collapsible
  179           .. (2 indent ) With particular mounting structure
  180           .. (2 indent ) Material
  181           .. (2 indent ) With vibratory filaments
  182           .. (2 indent ) With resonant chamber
  183           ... (3 indent ) Double wall
  184           .. (2 indent ) Having apertures in walls
  185           .. (2 indent ) With sound-path restriction
  186           ... (3 indent ) Adjustable
  187           .. (2 indent ) Plural intensifying portions
  188           ... (3 indent ) Similar portions
  189           .. (2 indent ) Multisection housing
  190           ... (3 indent ) Separable
  191           .. (2 indent ) With external sound deflector
  192           .. (2 indent ) Particular shape of the horn
  193           ... (3 indent ) Spiral sound path
  194           ... (3 indent ) Doubly folded sound path
  195           ... (3 indent ) Wide angle annular outlet
  196           . (1 indent ) Within tubular means
  197           .. (2 indent ) Adjustable
  198           . (1 indent ) Housing or enclosure (e.g., sound confining and absorbing)
  199           .. (2 indent ) Speaker type
  200           .. (2 indent ) Machine type enclosure
  201           ... (3 indent ) Offfice type devices (e.g., typewriters, teleprinters, etc.)
  202           ... (3 indent ) Electical type devices (e.g., transformers, motors, etc.)
  203           ... (3 indent ) Reaction engine test chamber
  204           ... (3 indent ) Internal-combustion engine
  205           ... (3 indent ) Partial enclosure or shroud
  206           . (1 indent ) By wave interference
  207           . (1 indent ) Mechanical vibration attenuator
  208           .. (2 indent ) Damping of flexural structure
  209           .. (2 indent ) Relatively moving parts
  210           . (1 indent ) Sound absorbing fence or screen (e.g., jet engine or vehicle noise)
  211           . (1 indent ) Combined
  212           . (1 indent ) Muffler, fluid conducting type
  213           .. (2 indent ) Reaction engine type
  214           ... (3 indent ) Upstream (e.g., intake silencer)
  215           ... (3 indent ) With adjustable outlet nozzle
  216           .... (4 indent ) Longitudinally adjustable section
  217           ... (3 indent ) Removable silencer unit (e.g., mobile)
  218           ... (3 indent ) Ground installation silencer
  219           ... (3 indent ) With adjustable internal baffles
  220           ... (3 indent ) With disparate fluid mingling
  221           .... (4 indent ) Liquid
  222           ... (3 indent ) With sound absorbing material
  223           .. (2 indent ) Silencer for firearms
  224           .. (2 indent ) Sound absorbing ventilating duct or curb (e.g., a/c, heat, air flow type)
  225           .. (2 indent ) With fan to assist fluid flow
  226           .. (2 indent ) With adjustable fluid flow
  227           .. (2 indent ) Pipe-muffler (e.g., tail pipe type)
  228           .. (2 indent ) With exhaust pipe
  229           .. (2 indent ) Carburetor, burner, or compressor intake silencer
  230           .. (2 indent ) Pneumatic type motor (e.g., air hammer, etc.)
  231           .. (2 indent ) With solid particle separator (e.g., spark arrestor, vacuum cleaner, etc.)
  232           .. (2 indent ) Separate distinct units serially connected
  233           .. (2 indent ) Liquid motion silencer
  234           ... (3 indent ) Water-closet type
  235           .. (2 indent ) Underwater discharge
  236           .. (2 indent ) With muffler cut-out
  237           .. (2 indent ) With pressure relief safety valve
  238           .. (2 indent ) Multiple distinct inlets and/or outlets
  239           ... (3 indent ) Outlets
  240           .. (2 indent ) Manifold type
  241           .. (2 indent ) Adjustable muffler (i.e., internal or external parts)
  242           .. (2 indent ) Mouthpiece (e.g., telephone, microphone, etc.)
  243           .. (2 indent ) With repair, replacement, or quick disassembly
  244           .. (2 indent ) Corrosion prevention
  245           ... (3 indent ) Internally coated parts
  246           ... (3 indent ) Nonmetallic
  247           .. (2 indent ) Straight-through passage
  248           ... (3 indent ) Continuous conduit
  249           .... (4 indent ) With expansion chamber
  250           .... (5 indent ) And side branch
  251           .... (5 indent ) And multi-passage
  252           ... (3 indent ) With sound absorbing material
  253           ... (3 indent ) With muffler bypass
  254           .... (4 indent ) Valve controlled
  255           ... (3 indent ) Expansion chamber
  256           .. (2 indent ) With sound absorbing material
  257           ... (3 indent ) And multi-passage
  258           ... (3 indent ) Pervious material interposed in flow path
  259           .. (2 indent ) With disparate fluid mingling
  260           ... (3 indent ) Liquid
  261           .... (4 indent ) Sprayed
  262           ... (3 indent ) Induced by suction
  263           .... (4 indent ) Motion induced
  264           .. (2 indent ) With baffle or baffle structure
  265           ... (3 indent ) Retroverted
  266           .... (4 indent ) And side branch chamber
  267           ... (3 indent ) Coaxial foraminous walls
  268           ... (3 indent ) Multi-passage
  269           ... (3 indent ) Expansion chamber type
  270           .... (4 indent ) With alternating partial baffles along the length of casing
  271           .... (4 indent ) With adjustable or flexible wall
  272           .... (4 indent ) Plural chambers
  273           .... (4 indent ) And side branch chamber
  274           .... (4 indent ) With centrifugal flow
  275           .... (4 indent ) And multi-passage
  276           ... (3 indent ) Side branch
  277           ... (3 indent ) Movable baffle
  278           .... (4 indent ) Biased
  279           ... (3 indent ) Spiral
  280           .... (4 indent ) Helical
  281           ... (3 indent ) Perpendicular and/or oblique
  282           ... (3 indent ) Casings
  283           .... (4 indent ) Air or liquid cooled
  284           . (1 indent ) Sound absorbing panels
  285           .. (2 indent ) Load bearing block type structure
  286           .. (2 indent ) Specific acoustical properties or dimensions
  287           .. (2 indent ) Movable/foldable panels
  288           .. (2 indent ) Cellular
  289           .. (2 indent ) Light permeable
  290           .. (2 indent ) Multilayer panel or wall structure
  291           ... (3 indent ) With membrane outer layer
  292           ... (3 indent ) With perforated or porous face and honeycomb-like core
  293           .. (2 indent ) With channels or cavities in surface layer
  294           .. (2 indent ) Materials
  295           . (1 indent ) Space absorbers
  296           . (1 indent ) Methods
 
 CROSS-REFERENCE ART COLLECTIONS
 
  400           WAVE COUPLING
  401           . (1 indent ) Earth
  402           . (1 indent ) Liquid
  403           REFRIGERATOR COMPRESSSOR MUFFLER
  404           HOBBY CRAFT ENGINE MUFFLER
 
 FOREIGN ART COLLECTIONS
 
  FOR000           CLASS-RELATED FOREIGN DOCUMENTS


   Note: Some content linked to on this page may require a plug-in for Adobe Acrobat Reader.

This file produced by USPTO - SIRA - Office of Patent Automation - ReferenceTools Project. Questions or comments relating to this file should be directed to Patent Automation Feedback.

Click to skip end of page links


Intranet Home | Index | Resources | Contacts | Internet | Search | Firewall | Web Services

This data is current as of June/2006