Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7471173 | Resonator, filter, nonreciprocal circuit device, and communication apparatus | Seiji Hidaka, Kei Matsutani | 2008-12-30 |
| 6998942 | Three-dimensional periodic structure, method of producing the same, high frequency element, and high frequency apparatus | Soshu Kirihara, Yoshinari Miyamoto, Jun Hattori | 2006-02-14 |
| 6861920 | COMPLEX CIRCUIT BOARD, NONRECIPROCAL CIRCUIT DEVICE, RESONATOR, FILTER, DUPLEXER COMMUNICATIONS DEVICE, CIRCUIT MODULE, COMPLEX CIRCUIT BOARD MANUFACTURING METHOD, AND NONRECIPROCAL CIRCUIT DEVICE MANUFACTURING METHOD | Yohei Ishikawa, Kei Matsutani | 2005-03-01 |
| 6657514 | Dielectric transmission line attenuator, dielectric transmission line terminator, and wireless communication device | Kei Matsutani, Atsushi Saito | 2003-12-02 |
| 6646516 | COMPLEX CIRCUIT BOARD, NONRECIPROCAL CIRCUIT DEVICE, RESONATOR, FILTER, DUPLEXER, COMMUNICATIONS DEVICE, CIRCUIT MODULE, COMPLEX CIRCUIT BOARD MANUFACTURING METHOD, AND NONRECIPROCAL CIRCUIT DEVICE MANUFACTURING METHOD | Yohei Ishikawa, Kei Matsutani | 2003-11-11 |
| 6583680 | Nonreciprocal circuit device and communications device | Katsuyuki Ohira | 2003-06-24 |
| 6496080 | Dielectric waveguide nonreciprocal circuit device with a non-interfering magnetic member support | Yutaka Ishiura, Kei Matsutani | 2002-12-17 |
| 6472960 | Complex circuit board with an electrode and air gap between dielectric and magnetic substrates | Yohei Ishikawa, Kei Matsutani | 2002-10-29 |
| 6441698 | Dielectric-waveguide attenuator, dielectric-waveguide terminator, and wireless apparatus incorporating same | Kei Matsutani | 2002-08-27 |
| 6380820 | Isolator utilizing a planar dielectric transmission line with a resistive film | Koichi Sakamoto | 2002-04-30 |
| 6359526 | Nonreciprocal circuit device including dielectric wave guide and a lower dielectric constant medium | Katsuyuki Ohira, Yutaka Ishiura | 2002-03-19 |
| 6208218 | Nonreciprocal circuit device including dielectric wave guide, dielectric wave guide device and radio device | Yutaka Ishiura, Katsuyuki Ohira | 2001-03-27 |
| 6060958 | Nonreciprocal circuit device having chamfered or tapered yoke side walls | Yutaka Ishiura | 2000-05-09 |
| 5926074 | Nonreciprocal circuit device | Katuyuki Ohira, Yutaka Ishiura | 1999-07-20 |
| 5838209 | Nonreciprocal junction circuit element having different conductor intersecting angles | Takekazu Okada, Takashi Hasegawa | 1998-11-17 |
| 5745014 | Nonreciprocal circuit element | Takekazu Okada, Takashi Hasegawa | 1998-04-28 |
| 5745015 | Non-reciprocal circuit element having a magnetic member integral with the ferrite member | Katsuyuki Ohira | 1998-04-28 |
| 5068629 | Nonreciprocal circuit element | Toshio Nishikawa, Takekazu Okada, Hiroki Dejima | 1991-11-26 |