Muffler, Fluid Conducting Type Patents (Class 181/212)

Reaction engine type (Class 181/213)

Silencer for firearms (Class 181/223)

Sound absorbing ventilating duct or curb (e.g., a/c, heat, air flow type) (Class 181/224)

With fan to assist fluid flow (Class 181/225)

With adjustable fluid flow (Class 181/226)

Pipe-muffler (e.g., tail pipe type) (Class 181/227)

With exhaust pipe (Class 181/228)

Carburetor, burner, or compressor intake silencer (Class 181/229)

Pneumatic type motor (e.g., air hammer, etc.) (Class 181/230)

With solid particle separator (e.g., spark arrestor, vacuum cleaner, etc.) (Class 181/231)

Separate distinct units serially connected (Class 181/232)

Liquid motion silencer (Class 181/233)

Underwater discharge (Class 181/235)

With muffler cut-out (Class 181/236)

With pressure relief safety valve (Class 181/237)

Multiple distinct inlets and/or outlets (Class 181/238)

Manifold type (Class 181/240)

Adjustable muffler (i.e., internal or external parts) (Class 181/241)

Mouthpiece (e.g., telephone, microphone, etc.) (Class 181/242)

With repair, replacement, or quick disassembly (Class 181/243)

Corrosion prevention (Class 181/244)

Straight-through passage (Class 181/247)

With sound absorbing material (Class 181/256)

With disparate fluid mingling (Class 181/259)

With baffle or baffle structure (Class 181/264)

prev … 2 3 4 5 6