Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5298813 | Polar leapfrog filter | Hiroshi Tanigawa, Isao Fukai, Hiroshi Kondo | 1994-03-29 |
| 5296763 | Polar leapfrog filter | Hiroshi Tanigawa, Hiroshi Kondo, Isao Fukai | 1994-03-22 |
| 5293086 | Polar leapfrog filter | Hiroshi Tanigawa, Hiroshi Kondo, Isao Fukai | 1994-03-08 |
| 5258716 | All-pass filter | Hiroshi Kondo, Hiroshi Tanigawa, Isao Fukai | 1993-11-02 |
| 5216375 | Variable time-constant type differentiator | Hiroshi Tanigawa, Hiroshi Kondou, Isao Fukai | 1993-06-01 |
| 5182522 | Polar leapfrog filter | Hiroshi Tanigawa, Hiroshi Kondo, Isao Fukai | 1993-01-26 |
| 5177382 | Active filter circuit | Hiroshi Kondo, Hiroshi Tanigawa, Isao Fukai | 1993-01-05 |
| 5138279 | Leapfrog filter | Hiroshi Kondo | 1992-08-11 |
| 5028884 | Leapfrog filter having adjustable center frequency and quality factor | Hiroshi Kondo, Takeyuki Kouti | 1991-07-02 |