| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 4 | |
| #2 | United States | 4 | |
| #3 | Germany | 1 | |
| #4 | Spain | 1 | |
| #5 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Foods and drinks | |
| #2 | Environmental technology | |
| #3 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Meat processing | |
| #2 | Steam engine plants | |
| #3 | Foods | |
| #4 | Water treatment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Welcker Roland L | 7 |
| #2 | Welcker Clyde J | 6 |
| #3 | J Welcker Clyde | 1 |
| #4 | L Welcker Roland | 1 |
| #5 | Roland Welcker | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES285034A1 | A method of treating prawns or similar (Machine-translation by Google Translate, not legally binding) | |
| US3143761A | Apparatus for processing shrimp and the like | |
| US3143763A | Shrimp processing method | |
| US3080605A | Food processing | |
| US2833709A | Electrolytic water correction device | |
| CA751592A | Food processing | |
| CA869755A | Shrimp processing machine | |
| CA584292A | Method of manufacture of and electrolytic water correction devices | |
| CA682945A | Process for chemically opening bivalves |