Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4510614 | Predistorted AM stereo transmission | Charles B. Fisher | 1985-04-09 |
| 4498073 | Keyboard with simultaneous operations | Charles B. Fisher | 1985-02-05 |
| 4484944 | Reduction of iron ores by hydrocarbons | Charles B. Fisher | 1984-11-27 |
| 4463392 | Recording system with noise reduction | Charles B. Fisher | 1984-07-31 |
| 4456990 | Periodic wave elimination by negative feedback | Charles B. Fisher | 1984-06-26 |
| 4429546 | Heat transfer in gas compression | Charles B. Fisher | 1984-02-07 |
| 4430620 | Demodulator system for double sideband suppressed carrier amplitude modulation | Charles B. Fisher | 1984-02-07 |
| 4406006 | Dual-signal A-M receiving apparatus | Charles B. Fisher | 1983-09-20 |
| 4401853 | AM Quadrature stereo systems | Charles B. Fisher | 1983-08-30 |
| 4397381 | Magnetic brakes and clutches | Charles B. Fisher | 1983-08-09 |
| 4387335 | Constant-frequency dynamo with stationary armature | Charles B. Fisher | 1983-06-07 |
| 4359091 | Recovery of underground hydrocarbons | Charles B. Fisher | 1982-11-16 |
| 4344483 | Multiple-site underground magnetic heating of hydrocarbons | Charles B. Fisher | 1982-08-17 |
| 4308614 | Noise-reduction sampling system | Charles B. Fisher | 1981-12-29 |
| 4285058 | Waveform correction by sampling | Charles B. Fisher | 1981-08-18 |
| 4278952 | Quantized angle modulator | Charles B. Fisher | 1981-07-14 |
| 4276624 | Acoustic transmission system | Charles B. Fisher | 1981-06-30 |
| 4268802 | Modulation distortion reducer | Charles B. Fisher | 1981-05-19 |
| 4268914 | Receiving apparatus for messages with in-band signals | Charles B. Fisher | 1981-05-19 |
| 4253066 | Synchronous detection with sampling | Charles B. Fisher | 1981-02-24 |
| 4253072 | Compandor with sampling and equalization | Charles B. Fisher | 1981-02-24 |
| 4249135 | Amplifier with switched capacitors | Charles B. Fisher | 1981-02-03 |
| 4249039 | Dual-modulation receiving apparatus | Charles B. Fisher | 1981-02-03 |
| 4249260 | Noise-reducing apparatus | Charles B. Fisher | 1981-02-03 |
| 4244376 | Measurement of evoked nervous system potentials | Charles B. Fisher | 1981-01-13 |