| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Brazil | 2 | |
| #2 | Germany | 2 | |
| #3 | France | 2 | |
| #4 | Hong Kong | 2 | |
| #5 | United States | 2 | |
| #6 | United Kingdom | 1 | |
| #7 | Italy | 1 | |
| #8 | Kenya | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Batteries | |
| #2 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Poon Ching-Chau | 3 |
| #2 | Pun Ching-Koon | 3 |
| #3 | Ching Koon Pun | 2 |
| #4 | Ching Chau Poon | 2 |
| #5 | Kong Kowloon Hong | 1 |
| #6 | Koon Pun Ching | 1 |
| #7 | Ching-Chau Poon | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1506579A | Leak-resistant dry cells | |
| DE1937605A1 | Electric drying element | |
| US3615863A | Electric dry cells | |
| US3623915A | Electric dry cells |