| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 4 | |
| #2 | France | 3 | |
| #3 | Canada | 2 | |
| #4 | Germany | 2 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Medical technology | |
| #2 | Machines | |
| #3 | Furniture and games | |
| #4 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Operating tables | |
| #2 | Chairs and beds | |
| #3 | Unspecified technologies | |
| #4 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | May Adam J | 7 |
| #2 | Fertig Charles W | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB361234A | Improvements in or relating to dental units | |
| DE435433C | Operating chair for dentists or the like. | |
| US1572215A | Supporting fixture | |
| US1440401A | Article-supporting means | |
| CA167211A | Foot rest for chairs | |
| US1199976A | Foot-rest for chairs. | |
| US1233859A | Dental chair. | |
| CA273223A | Extensible chair |