| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 13 | |
| #2 | United Kingdom | 2 | |
| #3 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Hydraulic engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Church William Lee | 16 |
| #2 | Ambursen Nils Frederich | 1 |
| #3 | Ambursen Nils Frederick | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA189545A | Apparatus for cement floors and walls | |
| CA190187A | Apparatus for constructing concrete floors | |
| CA117257A | Dam | |
| CA117256A | Method of building dams | |
| CA112053A | Dam | |
| CA110583A | Dam | |
| GB190707240A | Improvements in Dams. | |
| GB190702885A | Improvements in and relating to Dams. | |
| CA101259A | Dam for water works | |
| CA101257A | Flashboard holder for dams | |
| CA101258A | Dam | |
| CA98924A | Dam | |
| US840042A | Dam. | |
| CA97468A | Dam | |
| CA95423A | Shell dam | |
| CA94849A | Concrete dam |