| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | EPO (European Patent Office) | 4 | |
| #3 | Australia | 3 | |
| #4 | Canada | 3 | |
| #5 | China | 2 | |
| #6 | Japan | 2 | |
| #7 | WIPO (World Intellectual Property Organization) | 2 | |
| #8 | Brazil | 1 | |
| #9 | Hong Kong | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Spectacles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Porter David R | 21 |
| #2 | David R Porter | 3 |
| #3 | Porter David R Dr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2018356649A1 | Telescoping earpiece for eyeglasses | |
| US2015177535A1 | Collapsible eyeglass apparatus | |
| US2014152951A1 | Extendable eyeglasses and method of use | |
| EP2659303A1 | Extendable eyeglasses and method of use |