Mechanical Modification Or Sensing Of Storage Medium Patents (Class 369/127)
- From information modulated oscillator (Class 369/129)
- Sensing of elastic deformation or relaxation of storage medium (e.g., skid type) (Class 369/130)
- Bidirectional information flow (e.g., record/replay switching) (Class 369/131)
- Recording (Class 369/132)
- With particular amplification characteristic or signal control circuitry (e.g., muting) (Class 369/134)
- Multichannel (stereo cartridge) (Class 369/136)
- Plural styli (Class 369/140)
- Plural alternative or with signal handling adjunct (Class 369/141)
- Stylus controlled optical element (Class 369/142)
- Electron tube (Class 369/143)
- Electret or piezoelectric (Class 369/144)
- Semiconductive (Class 369/145)
- Magnetic field variation (e.g., magnetostrictive) (Class 369/146)
- Capacitive or electrolytic liquid (Class 369/150)
- Electrostatic or capacitive (Class 369/151)
- Variable resistance (Class 369/152)