Issued Patents All Time
Showing 51–70 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5903546 | Means and method of improving multiplexed transmission and reception by coding and modulating divided digital signals | Tamotsu Ikeda, Takahiro Okada | 1999-05-11 |
| 5890098 | Device and method for performing fast Fourier transform using a butterfly operation | Yasunari Kozaki, Osamu Ito | 1999-03-30 |
| 5867532 | Data reception apparatus, data transmission apparatus and method thereof | Osamu Ito, Tamotsu Ikeda | 1999-02-02 |
| 5808925 | Arithmetic unit and method for fourier transform | Osamu Ito | 1998-09-15 |
| 5805485 | Arithmetic unit and method for fourier transform | Osamu Ito | 1998-09-08 |
| 5805484 | Orthogonal function generating circuit and orthogonal function generating method | Tamotsu Ikeda, Takahiro Okada | 1998-09-08 |
| 5787123 | Receiver for orthogonal frequency division multiplexed signals | Takahiro Okada, Tamotsu Ikeda | 1998-07-28 |
| 5724394 | Viterbi decoding method and decoder capable of eliminating phase indeterminacy | Tamotsu Ikeda, Takahiro Okada | 1998-03-03 |
| 5691995 | Transmission of data by using convolutional coding of different code rates and the encoded data reception including decoding of the received data | Tamotsu Ikeda, Takahiro Okada | 1997-11-25 |
| 5675572 | Orthogonal frequency division multiplex modulation apparatus and orthogonal frequency division multiplex demodulation apparatus | Yasuhiro Hidejima, deceased, Takako Hidejima, legal representative | 1997-10-07 |
| 5506836 | Orthogonal frequency division multiplex demodulation | Toshihisa Hyakudai, Osamu Ito, Yoshikazu Miyato | 1996-04-09 |
| 5471464 | Orthogonal frequency division multiplex demodulation apparatus | — | 1995-11-28 |
| 5321398 | Variable length coder and data packing circuit | — | 1994-06-14 |
| 4672446 | Television receiver having interlaced scanning with doubled field frequency | Hiroshi Nakano, Hirofumi Yuchi | 1987-06-09 |
| 4651209 | Television display system with increased field frequency | Takashi Okada | 1987-03-17 |
| 4539592 | Double-scanning non-interlace television receiver | Yutaka Tanaka, Hiroshi Nakano | 1985-09-03 |
| 4524379 | Double-scanning non-interlace television receiver with vertical aperture correction circuit | Takashi Okada, Yutaka Tanaka | 1985-06-18 |
| 4521802 | Double-scanning non-interlace color television receiver | — | 1985-06-04 |
| 4509071 | Double-scanning non-interlace television receiver | Yasushi Fujimura, Takashi Okada, Yutaka Tanaka | 1985-04-02 |
| 4270216 | Tuning and volume indicator | Tadahiko Suzuki | 1981-05-26 |