Class F01N : GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
Subclass 1/12: Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally- or helically-shaped channels (F01N 1/1 takes precedence; cyclones B04C)
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 12104513 | Compact exhaust gas treatment system with serviceable filter | Jan 31, 22 | Oct 01, 24 | Dinex A/S |
| 11898474 | Constant velocity muffler assembly | Apr 27, 22 | Feb 13, 24 | Not available |
| 11846217 | Air-transparent selective sound silencer using ultra-open metamaterial | Dec 04, 20 | Dec 19, 23 | Trustees of Boston University |
| 11773760 | Overlapping vane muffler | Jun 05, 20 | Oct 03, 23 | The United States of America as represented by the Secretary of the Army |
| 11692470 | Exhaust system and muffler | Jun 04, 20 | Jul 04, 23 | Tenneco Automotive Operating Company Inc. |
| 11187136 | Vorticity based noise abatement | Dec 19, 17 | Nov 30, 21 | The United States of America as represented by the Secretary of the Army |
| 10947876 | Air-transparent selective sound silencer using ultra-open metamaterial | Aug 02, 19 | Mar 16, 21 | The Trustees of Boston University |
| 10883399 | Methods of and systems for constraining fibrous material during filling operation | Sep 22, 17 | Jan 05, 21 | OCV Intellectual Capital, LLC. |
| 10738685 | Apparatus for increasing flow rate in engine pipe and processing method therefor | Feb 26, 16 | Aug 11, 20 | Not available |
| 10273862 | Engine exhaust extractor with internal airfoils and method of manufacturing | Feb 15, 17 | Apr 30, 19 | EXHAUST THRUSTER, LLC |
| 10273844 | Muffler | Mar 13, 17 | Apr 30, 19 | Not available |
| 10001048 | Cyclonic thermal diffuser and method | Mar 21, 16 | Jun 19, 18 | PACCAR Inc. |
| 9534525 | Mixer assembly for exhaust aftertreatment system | May 27, 15 | Jan 03, 17 | TENNECO AUTOMOTIVE OPERATING COMPANY INC. |
| 9500108 | Split path silencer | Jan 09, 15 | Nov 22, 16 | FLEXIBLE METAL INC. |
| 9399936 | Exhaust apparatus | Mar 20, 15 | Jul 26, 16 | KAWASAKI JUKOGYO KABUSHIKI KAISHA |
| 9249703 | Compact muffler for small two-stroke internal combustion engines | Nov 11, 13 | Feb 02, 16 | NORTHWEST ULD, INC. DBA NORTHWEST UAV PROPULSION SYSTEMS |
| 9175644 | Engine with exhaust gas recirculation system and variable geometry turbocharger | Apr 24, 13 | Nov 03, 15 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 9121319 | Low pressure drop, high efficiency spark or particulate arresting devices and methods of use | Oct 16, 12 | Sep 01, 15 | UNIVERSAL ACOUSTIC & EMISSION TECHNOLOGIES |
| 8833513 | Exhaust muffler provided with tail pipe | Sep 07, 11 | Sep 16, 14 | Matsushou Co., Ltd. |
| 8813908 | HVAC blower with noise suppression features | Mar 08, 13 | Aug 26, 14 | FORD GLOBAL TECHNOLOGIES, LLC |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2024/0077,008 | AIR-TRANSPARENT SELECTIVE SOUND SILENCER USING ULTRA-OPEN METAMATERIAL | Nov 08, 23 | Mar 07, 24 | Not available |
| 2022/0099,006 | A sound attenuator as well as elements and a method of production thereof | Jan 29, 20 | Mar 31, 22 | Not available |
| 2019/0345,856 | METHODS OF AND SYSTEMS FOR CONSTRAINING FIBROUS MATERIAL DURING FILLING OPERATION | Sep 22, 17 | Nov 14, 19 | Not available |
| 2018/0328,266 | APPARATUS FOR INCREASING FLOW RATE IN ENGINE PIPE AND PROCESSING METHOD THEREFOR | Feb 26, 16 | Nov 15, 18 | Not available |
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