DD17853A - - Google Patents
Info
- Publication number
- DD17853A DD17853A DD17853DA DD17853A DD 17853 A DD17853 A DD 17853A DD 17853D A DD17853D A DD 17853DA DD 17853 A DD17853 A DD 17853A
- Authority
- DD
- German Democratic Republic
Links
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DD17853A true DD17853A (en) |
Family
ID=229271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DD17853D DD17853A (en) |
Country Status (1)
| Country | Link |
|---|---|
| DD (1) | DD17853A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3430334A1 (en) * | 1984-08-17 | 1986-02-27 | Optische Werke G. Rodenstock, 8000 München | PROGRESSIVE EYEWEAR WITH TWO ASPHERIC AREAS |
-
0
- DD DD17853D patent/DD17853A/xx unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3430334A1 (en) * | 1984-08-17 | 1986-02-27 | Optische Werke G. Rodenstock, 8000 München | PROGRESSIVE EYEWEAR WITH TWO ASPHERIC AREAS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4955712A (en) | Multifocal lens | |
| US5444503A (en) | Spectacle lens | |
| US4856889A (en) | Uniform strength ophthalmic lens having a gradient refractive index changing rotation-symmetrically about the optical axis and method of making it | |
| EP0452802B1 (en) | Progressive surface for a progressive lens | |
| EP0947871A1 (en) | Multifocal lens | |
| EP0392479A1 (en) | Optical lens or lens system with variable servo control focusing as well as progressively varying focal power | |
| DD17853A (en) |