Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5638478 | Optical fiber cable having a grooved spacer formed with one or more SZ-spiral grooves on its outer circumference along the longitudinal direction of the spacer the inverting angle of each groove being at least 180.degree. | Daisuke Iwakura, Kazuo Hogari, Shigekazu Hayami, Shigeru Tomita | 1997-06-10 |