| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 12 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Optics | |
| #3 | Electrical machinery and energy | |
| #4 | Measurement | |
| #5 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Advertising | |
| #2 | Optical systems | |
| #3 | Mechanically-driven clocks | |
| #4 | Lighting device details | |
| #5 | Special designs |
| # | Name | Total Patents |
|---|---|---|
| #1 | Ringleb Alexander Dr | 12 |
| #2 | Krone Gustav | 4 |
| #3 | Krone Heinz | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE813981C | Device to increase the evenness and preferably also the strength of the passage of light through translucent surfaces |