| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | United States | 4 | |
| #3 | France | 3 | |
| #4 | Italy | 1 | |
| #5 | Taiwan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Chang Chung Jen | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2015160534A1 | Lens cap | |
| GB201320979D0 | Lens cap | |
| FR2986084A3 | Objective cap | |
| US8475063B1 | Lens cap | |
| GB201122453D0 | Lens cap | |
| TW201327007A | Lens cap | |
| FR2980593A3 | Objective cap | |
| GB201114940D0 | Lens cap | |
| US2013051784A1 | Combination of cover with hood | |
| FR2974640A3 | Combining a cache with a parasolil for a camera or camera objective | |
| US8280241B1 | Combination of cover with hood | |
| GB201105869D0 | Combined hood and cover | |
| GB2062974A | Electric motor | |
| IT7967120D0 | Electric motor with eccentric rotor - mounted on shaft whose speed is proportional to difference between stator bore and rotor outside diameters |