| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | Germany | 3 | |
| #3 | Spain | 2 |
| # | Industry | |
|---|---|---|
| #1 | Medical technology | |
| #2 | Optics | |
| #3 | Electrical machinery and energy | |
| #4 | Environmental technology | |
| #5 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Diagnosis and surgery | |
| #2 | Optical systems | |
| #3 | Unspecified technologies | |
| #4 | Batteries | |
| #5 | Reduction of greenhouse gas emissions | |
| #6 | Portable lighting devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hotchkiss John E | 6 |
| #2 | Ellsworth Hotchkiss John | 2 |
| #3 | Ellsworth Hotchkiss Dr Med Joh | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3609262A | Neck-carried battery pack | |
| US3589799A | Optical system for illumination and viewing of an area | |
| US3638643A | Endoscope for photographic recording | |
| US3596653A | Endoscope with coincident illumination and viewing | |
| US3605730A | Illuminating endoscope with improved gripping means | |
| US3543746A | Endoscope having improved illumination system |