| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | United Kingdom | 3 | |
| #3 | Canada | 2 | |
| #4 | France | 2 | |
| #5 | Sweden | 2 | |
| #6 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Dredging | |
| #2 | Scaffolding | |
| #3 | Construction of roads | |
| #4 | Unspecified technologies | |
| #5 | Cranes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Armstrong Anthony Clubley | 3 |
| #2 | Armstrong Anthony C | 3 |
| #3 | Armstrong A C | 2 |
| #4 | Wadsworth Eric | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4153301A | Apparatus for breaking up a layer of substantially rigid material | |
| GB1556369A | Grabs | |
| GB1499329A | Apparatus for breaking up a layer of substantially rigid material | |
| GB1472069A | Hydraulically operated shovels | |
| DE2022368A1 | Vehicle with a chassis for supporting a turntable |