| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 14 | |
| #2 | Germany | 2 | |
| #3 | Canada | 1 | |
| #4 | Switzerland | 1 | |
| #5 | Spain | 1 | |
| #6 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Nails | |
| #3 | Machines for making railways |
| # | Name | Total Patents |
|---|---|---|
| #1 | Julien Villeval Andre Constant | 1 |
| #2 | Villeval Andre | 1 |
| #3 | Antonin Brogiotti | 1 |
| #4 | Bied-Charreton Francois | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1173054B | Expanding sleeve anchors, especially for mining | |
| DE1292448B | Anchor, with shells forming an expansion sleeve | |
| ES228434A1 | Anchorage device. (Machine-translation by Google Translate, not legally binding) | |
| GB805797A | Improvements in and relating to an anchoring device e.g. for mine roofs and walls | |
| CA609944A | Anchoring device |