| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 16 | |
| #2 | Switzerland | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Belgium | 1 | |
| #5 | Germany | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Measurement | |
| #3 | Materials and metallurgy | |
| #4 | Machine tools | |
| #5 | Machines | |
| #6 | Furniture and games | |
| #7 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Spectacles | |
| #2 | Optical systems | |
| #3 | Grinding or polishing devices | |
| #4 | Special furniture | |
| #5 | Alloys | |
| #6 | Goods for writing upon | |
| #7 | Testing of structures | |
| #8 | Producing goods from plastic |
| # | Name | Total Patents |
|---|---|---|
| #1 | Cretin-Maitenaz Bernard | 3 |
| #2 | Fernand Robert Cretin-Maitenaz | 1 |
| #3 | Chaix Paul | 1 |
| #4 | Robert Cretin-Maitenaz Bernard | 1 |
| #5 | Poichet Lucien | 1 |
| #6 | Cretin-Maitenaz Andre | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB827486A | Improvements in or relating to spectacle frames | |
| DE1151955B | Optical element with constantly changing refractive power | |
| GB762055A | Improvements in or relating to the fixing of lenses in spectacle frames | |
| US2851925A | Mounting of lenses in spectacle frames |