| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | WIPO (World Intellectual Property Organization) | 5 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | Australia | 2 | |
| #5 | Canada | 2 | |
| #6 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Medical technology | |
| #3 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Optical systems | |
| #2 | Diagnosis and surgery | |
| #3 | Spectacles | |
| #4 | Office furniture |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoogland Jan | 19 |
| #2 | Overbeek Jan Willem Josef | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2021015356A1 | Optometer for Home Use | |
| US10537241B1 | Subjective optometer for home use | |
| US2020073146A1 | Generic Reading Glasses with Convergence Assistance | |
| EP2078473A1 | Assortment cabinet | |
| AU2001245342B2 | Integrated optical system for endoscopes and the like | |
| CA2207068A1 | Integrated optical system for endoscopes and the like | |
| US4993817A | Endoscope relay optics | |
| US4946267A | Endoscope relay optics | |
| US4575195A | Flat field lenses | |
| US4545652A | Flat field lenses |