BE571668A - - Google Patents
Info
- Publication number
- BE571668A BE571668A BE571668DA BE571668A BE 571668 A BE571668 A BE 571668A BE 571668D A BE571668D A BE 571668DA BE 571668 A BE571668 A BE 571668A
- Authority
- BE
- Belgium
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/20—Uniting glass pieces by fusing without substantial reshaping
- C03B23/22—Uniting glass lenses, e.g. forming bifocal lenses
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/02—Lenses; Lens systems ; Methods of designing lenses
- G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
Landscapes
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US837727XA | 1957-10-07 | 1957-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE571668A true BE571668A (is) |
Family
ID=22180599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE571668D BE571668A (is) | 1957-10-07 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE571668A (is) |
| GB (1) | GB837727A (is) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3178274A (en) * | 1958-05-13 | 1965-04-13 | Pittsburgh Plate Glass Co | Ophthalmic glass |
-
0
- BE BE571668D patent/BE571668A/xx unknown
-
1958
- 1958-09-02 GB GB28120/58A patent/GB837727A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB837727A (en) | 1960-06-15 |