| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | Canada | 2 | |
| #3 | Spain | 2 | |
| #4 | Switzerland | 1 | |
| #5 | Denmark | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Spectacles | |
| #2 | Grinding tools | |
| #3 | Grinding or polishing devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gowlland Henry Orford | 8 |
| #2 | Henry Orford Gowlland | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA176090A | Smoothing head for eyeglass lenses | |
| GB112297A | Process for Manufacturing Multi-focal Eyeglass Lenses. | |
| GB111716A | Smoothing Tools for use in the Manufacture of Lenses. | |
| US1212628A | Smoothing-head for manufacturing eyeglass-lenses. | |
| GB191503776A | Multi-focal Eyeglass Lens. | |
| GB191505583A | Improvements in or relating to Lenses for Spectacles and Eye-glasses. | |
| CA176683A | Machine for grinding eye glass lenses |