| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 10 | |
| #2 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Spectacles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hasegawa Keizo | 12 |
| Publication | Filing date | Title |
|---|---|---|
| JP2020062065A | Optometry frame | |
| JP2017070419A | Light-weight optometry frame | |
| JP2015134006A | Tableware | |
| JP2015016001A | Ring frame for optometry test lens | |
| JP2015007726A | Optometry testing frame for highly curved lens | |
| JP2012239689A | Optometric test frame | |
| JP2010227210A | Hanger | |
| JP2009294491A | Support angle variable ear pad | |
| JP2009210952A | Nose pad for resin-made spectacle frame | |
| JP2009098406A | Spectacle frame and component thereof |