Electro-acoustic Audio Transducer Patents (Class 381/150)
- Compound (Class 381/170)
- Micromagnetic (Class 381/171)
- Light modifying (Class 381/172)
- Piezoelectric or ferroelectric (Class 381/173)
- Capacitive (Class 381/174)
- Semiconductor junction microphone (Class 381/175)
- Conductive diaphragm (e.g., reed, ribbon) (Class 381/176)
- Dynamic (e.g., magnetic) (Class 381/177)
- Vibrating electrical contract (Class 381/178)
- Resistive (Class 381/179)
- Directional, directible, or movable (Class 381/387)
- With furniture, clothing, or image display (Class 381/388)
- In vehicle (Class 381/389)
- Boom or support arm (Class 381/390)
- Grille (Class 381/391)
- Resilient (Class 381/392)
- electrical insulation feature (Class 381/393)
- Electrical hardware (Class 381/394)
- Mechanical detail (Class 381/395)
- Cooling feature (Class 381/397)
- Having diaphragm support feature (Class 381/398)
- Conductive diaphragm (e.g., ribbon) (Class 381/399)
- Movable voice coil (Class 381/400)
- Including adjustment mechanism (Class 381/411)
- Magnetic circuit (Class 381/412)
- Specified diaphragm shape or structure (Class 381/423)
- Basket detail (Class 381/433)