| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Canada | 4 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Optics | |
| #4 | Packaging and shipping | |
| #5 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Manufacturing processes | |
| #2 | Grinding or polishing devices | |
| #3 | Spectacles | |
| #4 | Containers for goods storage | |
| #5 | Supplying combustion engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Clement George A | 12 |
| #2 | Hurdle Julian A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2509211A | Apparatus for blocking lenses | |
| US2333362A | Bifocal lens blank | |
| US2007366A | Manufacture of lenses | |
| US1978896A | Fusing method and clip in the manufacture of fused multifocal lens blanks | |
| US1911806A | Multifocal lens and method of making same | |
| US1627148A | Marking fused bifocal lenses for identification | |
| US1516334A | Attachment for can covers | |
| US1061582A | Carbureter. | |
| CA108305A | Knob lock | |
| CA346778A | Multifocal lens | |
| CA426620A | Bifocal lens blank | |
| CA345761A | Multifocal lens manufacture |