Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6919954 | Method and apparatus for measuring internal index of refraction of preform of optical fiber | Fujio Kato | 2005-07-19 |
| 6611321 | Method of measuring distribution of internal reactive index for optical fiber preform and measuring device | — | 2003-08-26 |
| 4640615 | Liquid refractometer | — | 1987-02-03 |
| 4519704 | Measurement of optical refractive index profiles | Robert J. Mansfield, David Neil Payne | 1985-05-28 |
| 4515475 | Measurement of refractive index profile | David Neil Payne, Michael J. Adams | 1985-05-07 |