| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 6 | |
| #2 | France | 4 | |
| #3 | Switzerland | 3 | |
| #4 | Belgium | 2 | |
| #5 | Denmark | 2 | |
| #6 | Netherlands | 2 | |
| #7 | Austria | 1 | |
| #8 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Domestic heating systems | |
| #2 | Pipes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Engelberg Erwin | 4 |
| #2 | Erwin Engelberg | 1 |
| #3 | Ewert Joachim | 1 |
| #4 | Rietschel Henneberg | 1 |
| #5 | Engelberg E | 1 |
| #6 | Raiss Dr-Ing Wilhelm | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2847968A1 | Medium distribution and collection equipment - has main and auxiliary unions of manifolds in same plane | |
| DE2205034A1 | ARRANGEMENT FOR JOINING PIPES, IN PARTICULAR FOR HEATING SYSTEMS | |
| NL166781B | Distribution and collection device for heating installations or the like. | |
| NL166780B | Heating device with head distribution and a return collector. |