| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United States | 6 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machine tools | |
| #3 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Grebner Fritz | 6 |
| #2 | Fritz Grebner | 4 |
| #3 | Gerhard Spindler | 2 |
| #4 | Poetzsch Dipl-Ing Helmut | 2 |
| #5 | Helmut Potzsch | 1 |
| #6 | Kolsch Wihel | 1 |
| #7 | Wink Eckhard | 1 |
| #8 | Wilhelm Kolsch | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3595517A | Form for making concrete slab | |
| GB816059A | Lattice girders and structural steel lattice framework |