Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6733124 | Contact lens | Keiji Sugimoto, Tadashi Sawano | 2004-05-11 |
| 6726323 | Contact lens and method of designing the same | Tadashi Sawano, Arata Kouzai, Kiyosei Kondo | 2004-04-27 |
| 6659607 | Contact lens | Keiji Sugimoto, Tadashi Sawano, Shigeyasu Nagai, Asaki Suzaki, Hideaki Kondo | 2003-12-09 |
| 6357876 | Multifocal ocular lens having intermediate-distance vision correction region formed in central part of vision correction area | Hiroyuki Oyama, Hideaki Kondou | 2002-03-19 |
| 6286956 | Multifocal ocular lens including intermediate vision correction region between near and distant vision correction regions | Hiroyuki Oyama, Tadashi Sawano, Asaki Suzaki, Yukihisa Sakai | 2001-09-11 |
| 6260966 | Multifocal ocular lens | Tadashi Sawano, Hiroyuki Ohyama, Yuuzi Gotou, Hideaki Kondou | 2001-07-17 |
| 6199982 | Presbyopia correction contact lens | Hiroyuki Oyama, Tadashi Sawano, Asaki Suzaki | 2001-03-13 |
| 6030077 | Multifocal ocular lens having intermediate region with continuously varying optical power | Tadashi Sawano, Hiroyuki Ohyama, Yuuzi Gotou | 2000-02-29 |
| 5532768 | Contact lens | Takayuki Onogi, Keiji Yamashita | 1996-07-02 |
| 5502517 | Soft contact lens with a back surface whose central and intermediate portions are formed by different ellipsoidal surfaces continuously contiguous to each other | Naoki Anan, Bungo Takagi | 1996-03-26 |
| 5307740 | Marking apparatus for contact lens | Yasuyoshi Yamamoto, Chikai Kosaka | 1994-05-03 |