| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 | |
| #2 | Germany | 9 | |
| #3 | Canada | 7 | |
| #4 | United Kingdom | 7 | |
| #5 | Italy | 6 | |
| #6 | France | 5 | |
| #7 | Australia | 3 | |
| #8 | Switzerland | 3 | |
| #9 | Netherlands | 2 | |
| #10 | Sweden | 2 | |
| #11 | Brazil | 1 | |
| #12 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Medical technology |
| # | Technology | |
|---|---|---|
| #1 | Motor vehicles | |
| #2 | Operating tables | |
| #3 | Unspecified technologies | |
| #4 | Hand carts | |
| #5 | Unspecified technologies | |
| #6 | Load transportation vehicles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Misawa Rintaro | 35 |
| #2 | Ikarimoto Yasuaki | 6 |
| #3 | Takahashi Kou | 6 |
| #4 | Lehner Max | 3 |
| #5 | Rintaro Misawa | 3 |
| #6 | Mitsuru Shiota | 1 |
| #7 | Hidaka Hideto | 1 |
| #8 | Takeaki Yamagata | 1 |
| #9 | Yasuaki Ikarimoto | 1 |
| #10 | Misawa R | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5676215A | Stair-climbing crawler transporter | |
| AU2397188A | Stair-climbing wheelchair carrier with crawlers | |
| GB8712462D0 | A wheelchair carrier | |
| US4688813A | Carrier for rescuing patients | |
| US4681330A | Hand truck | |
| CA1223611A | Carrier for rescuing patients | |
| CA1150333A | Stair climbing wheelchair carrier | |
| US4062418A | Apparatus for supporting loads in a cart | |
| US4033421A | Stairway-climbing cart | |
| GB1440485A | Trolley capable of climbing a stairway |