Issued Patents All Time
Showing 51–68 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4638180 | Frequency divider circuits | Morikazu Sagawa, Yoshikazu Mori, Motoi Ohba, Sadahiko Yamashita | 1987-01-20 |
| 4631506 | Frequency-adjustable coaxial dielectric resonator and filter using the same | Haruyoshi Endo, Sadahiko Yamashita | 1986-12-23 |
| 4590443 | Transistor oscillator with compensating circuit for variable collector-base capacitance | Isao Ishigaki, Sadahiko Yamashita | 1986-05-20 |
| 4583064 | Strip-line resonator | Morikazu Sagawa, Sadahiko Yamashita, Yoshihiko Takayama | 1986-04-15 |
| 4536724 | Voltage-controlled oscillator having three or more varactor diodes | Makoto Hasegawa, Sadahiko Yamashita, Yoshio Katayama | 1985-08-20 |
| 4506241 | Coaxial dielectric resonator having different impedance portions and method of manufacturing the same | Yukichi Aihara, Sadahiko Yamashita | 1985-03-19 |
| 4449108 | Band-stop filter for VHF-UHF band | Haruyoshi Endo, Ko KIKUCHI, Sadahiko Yamashita | 1984-05-15 |
| 4437076 | Coaxial filter having a plurality of resonators each having a bottomed cylinder | Haruyoshi Endo, Ko KIKUCHI, Sadahiko Yamashita | 1984-03-13 |
| 4423396 | Bandpass filter for UHF band | Sadahiko Yamashita | 1983-12-27 |
| 4412351 | Microwave mixing circuit | Hiroshi Onishi, Sadahiko Yamashita | 1983-10-25 |
| 4382238 | Band stop filter and circuit arrangement for common antenna | Sadahiko Yamashita | 1983-05-03 |
| 4371853 | Strip-line resonator and a band pass filter having the same | Sadahiko Yamashita | 1983-02-01 |
| 4361820 | Hybrid microwave circuit | Morikazu Sagawa, Sadahiko Yamashita | 1982-11-30 |
| 4292610 | Temperature compensated coaxial resonator having inner, outer and intermediate conductors | Sadahiko Yamashita | 1981-09-29 |
| 4268809 | Microwave filter having means for capacitive interstage coupling between transmission lines | Sadahiko Yamashita | 1981-05-19 |
| 4254390 | Compact electronic tuning device | Mitsuo Saito, Sadahiko Yamashita | 1981-03-03 |
| 4224587 | Comb-line bandpass filter | Sadahiko Yamashita | 1980-09-23 |
| 4214218 | Impedance matched tuning device having image trapping circuit | Mitsuo Saito, Sadahiko Yamashita | 1980-07-22 |