| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | United Kingdom | 2 | |
| #3 | Italy | 2 | |
| #4 | Germany | 1 | |
| #5 | Spain | 1 | |
| #6 | India | 1 |
| # | Technology | |
|---|---|---|
| #1 | Spectacles | |
| #2 | Producing goods from plastic | |
| #3 | Certain plastics | |
| #4 | Manufacturing processes | |
| #5 | Fillers | |
| #6 | Shaping of plastics | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bristol Alexander C | 10 |
| #2 | Bristol Alexander Christian | 1 |
| #3 | Alexander Christian Bristol | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5131738A | Lens blank | |
| US5147437A | Invisible flat-top mold blank and method for manufacturing same | |
| US5054904A | Aspheric lens blank | |
| US4883524A | Invisible flat-top mold blank and method for manufacturing same | |
| US4538887A | Aspheric spectacle lens blank | |
| US4573777A | Aspheric spectacle lens blank |