| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | Canada | 2 | |
| #3 | Germany | 2 | |
| #4 | United Kingdom | 2 | |
| #5 | Spain | 1 | |
| #6 | United States | 1 |
| # | Technology | |
|---|---|---|
| #1 | Producing goods from plastic | |
| #2 | Shaping of plastics | |
| #3 | Certain plastics | |
| #4 | Unspecified technologies | |
| #5 | Spectacles | |
| #6 | Fillers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grandperret Rene | 4 |
| #2 | Rene Grandperret | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB847345A | Improvements in and relating to manufacture of lenses | |
| US3278654A | Apparatus and method of producing optical and ophthalmic lenses from thermosetting resin materials | |
| CA596660A | Methods of producing optical and ophtalmic lenses from thermosetting resin materials | |
| CA596659A | Production of optical and ophtalmic lenses from thermosetting resin materials |