Assignee
Inventors
- Sadao Nakashima (13 patents)
- Terukazu Ohno (4 patents)
- Toshiaki Tsuchiya (17 patents)
- Tetsushi Sakai (8 patents)
- Shinji Nakamura (131 patents)
- Takemi Ueki (1 patents)
- Yuichi Kado (3 patents)
- Tadao Takeda (11 patents)
US Patent 5989981 · Granted Nov 23, 1999