| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | Canada | 1 | |
| #3 | China | 1 | |
| #4 | Germany | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Hong Kong | 1 | |
| #8 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Writing or drawing tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Katoh Hiroyasu | 6 |
| #2 | Kato Hiroyasu | 3 |
| #3 | Hiroyasu Katoh | 1 |
| #4 | Hiroyasu Kato | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4601599A | Ball-point pen |