| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 55 | |
| #2 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Electrical machinery and energy | |
| #3 | Organic fine chemistry | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Electric switches | |
| #3 | Electrically-conductive connections | |
| #4 | Special acyclic compounds | |
| #5 | Optical systems | |
| #6 | Acyclic or carbocyclic compounds | |
| #7 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zillmer Erich | 54 |
| #2 | Erich Zillmer | 3 |
| #3 | Krull Ernst | 1 |
| #4 | Johannsen Hans-Werner | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1147771B | Lamp adjustment device for projector | |
| US3028788A | Focusing mechanism for projector | |
| US3006243A | Slide projector | |
| US2573088A | Projector provided with protecting casing |