| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | New Zealand | 3 | |
| #4 | WIPO (World Intellectual Property Organization) | 3 | |
| #5 | South Africa | 3 | |
| #6 | Canada | 2 | |
| #7 | Switzerland | 2 | |
| #8 | Spain | 2 | |
| #9 | Israel | 2 | |
| #10 | India | 2 | |
| #11 | Belgium | 1 | |
| #12 | Brazil | 1 | |
| #13 | China | 1 | |
| #14 | Italy | 1 | |
| #15 | Republic of Korea | 1 | |
| #16 | Netherlands | 1 | |
| #17 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Furniture and games | |
| #3 | Machines | |
| #4 | Machine tools | |
| #5 | Basic materials chemistry | |
| #6 | Packaging and shipping |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zellweger Conrad | 23 |
| #2 | Spreter Victor | 11 |
| #3 | Spreter Victor C | 11 |
| #4 | Zellweger C | 3 |
| #5 | Spreter V C | 2 |
| #6 | Victor Spretter | 1 |
| #7 | Spreter V | 1 |
| #8 | Spreter Victor Charles | 1 |
| #9 | Conrad Zellweger | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH663888A5 | Method for manufacturing a heating element. | |
| IT8268460D0 | Heater for liquids and solids | |
| BR8206575A | Heating appliance | |
| ZA8208047B | Heating device | |
| AU9013782A | Exothermic heater | |
| NZ202315A | Heating device:heating element in base of container includes ignition means and combustible material | |
| CH650581A5 | Igniter for fuel charge. | |
| BE894859A | Heater for liquids and solids - has container with base heater formed of mass of exothermic material requiring no gas | |
| IL67076D0 | Heating device | |
| WO8300425A1 | Heating device |