| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 19 |
| # | Industry | |
|---|---|---|
| #1 | Medical technology | |
| #2 | Electrical machinery and energy | |
| #3 | Optics | |
| #4 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Diagnosis and surgery | |
| #2 | Lighting device details | |
| #3 | Cameras | |
| #4 | Testing of structures | |
| #5 | Spectacles | |
| #6 | Electrically-conductive connections | |
| #7 | Measuring length, angles and areas |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zeng Henry L De | 19 |
| Publication | Filing date | Title |
|---|---|---|
| US1158187A | Ophthalmological instrument. | |
| US1230568A | Iris-diaphragm. | |
| US1152152A | Optical instrument. | |
| US1128859A | Ophthalmoscope or other optical instrument. | |
| US1115408A | Optical instrument. | |
| US1087532A | Optical instrument. | |
| US1218243A | Lens-measuring device. | |
| US1059715A | Optical instrument. | |
| US1165232A | Optical instrument. | |
| US1047000A | Lens-testing instrument. | |
| US1010125A | Current-tap. | |
| US1062698A | Auriscope. | |
| US963036A | Headlight or illuminator. | |
| US941766A | Optometer. | |
| US842181A | Nose-piece for eyeglasses. | |
| US787083A | Ophthalmoscope. | |
| US654878A | Lamp-holder. | |
| US1068226A | Optical instrument. | |
| US1066386A | Ophthalmoscope. |