| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 20 | |
| #2 | Republic of Korea | 5 | |
| #3 | United States | 5 | |
| #4 | China | 4 | |
| #5 | EPO (European Patent Office) | 4 | |
| #6 | Taiwan | 3 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machine tools | |
| #3 | Packaging and shipping | |
| #4 | Machines | |
| #5 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Gearing | |
| #2 | Accessories for machine tools | |
| #3 | Transport or storage devices | |
| #4 | Unspecified technologies | |
| #5 | Shafts | |
| #6 | Clutches and brakes | |
| #7 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kato Heizaburo | 18 |
| #2 | Kato Toshinao | 12 |
| #3 | Kato Hisanao | 8 |
| #4 | Hayakawa Akihiro | 3 |
| #5 | Ito Hisayoshi | 3 |
| #6 | Toshinao Kato | 2 |
| #7 | Akihiro Hayakawa | 1 |
| #8 | Yagi Hiroki | 1 |
| #9 | Heizaburo Kato | 1 |
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