| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | Austria | 2 | |
| #3 | Switzerland | 2 | |
| #4 | United States | 2 | |
| #5 | Belgium | 1 | |
| #6 | Canada | 1 | |
| #7 | France | 1 | |
| #8 | United Kingdom | 1 | |
| #9 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Machine tools | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Finishing work on buildings | |
| #3 | Unspecified technologies | |
| #4 | Pipes | |
| #5 | Hand-held nailing tools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frueh Friedrich | 12 |
| #2 | Fruh Friedrich | 2 |
| #3 | Friedrich Frueh | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE4421298A1 | Load-bearing element for suspending a retaining rail on a building ceiling | |
| DE4421297A1 | Device for fastening a ceiling cladding on a building ceiling | |
| DE4013459A1 | Fastening device for an end strip | |
| US4065901A | Connecting element for wall or ceiling panels when constructed by a dry method | |
| US3495796A | Hanger for suspended ceilings | |
| GB1033056A | Clip for use in the construction of ceilings |