| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Denmark | 5 | |
| #3 | Germany | 4 | |
| #4 | Spain | 3 | |
| #5 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Electrical machinery and energy | |
| #3 | Engines, pumps and turbines | |
| #4 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Vehicle tyre repairing | |
| #2 | Cylinders for combustion engines | |
| #3 | Magnets and transformers | |
| #4 | Motor vehicles | |
| #5 | Electric discharge tubes | |
| #6 | AC and DC conversion devices | |
| #7 | Metal tempering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hetz Fritz | 10 |
| #2 | Fritz Hetz | 6 |
| Publication | Filing date | Title |
|---|---|---|
| ES155619A1 | Improvements introduced in the manufacture of anti-slip chains for vehicle tires | |
| ES151635A1 | An anti-slip chain for automotive vehicle rims | |
| DE759575C | Anti-skid chain for vehicle tires |