| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | Denmark | 3 | |
| #3 | Spain | 3 | |
| #4 | Switzerland | 2 | |
| #5 | Canada | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Marine propulsion |
| # | Name | Total Patents |
|---|---|---|
| #1 | Piedfort Alfred | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US648218A | Steering mechanism. | |
| GB189915379A | Improved Jacquard-card Stamping Machine. | |
| GB189522864A | Improvements in or relating to Telegraphic Receivers, especially applicable for Submarine Telegraphy. | |
| GB189421250A | Improvements in or relating to Multiple Telegraphic Apparatus. | |
| GB189316008A | Improvements in or relating to Multiple Telegraphy. | |
| CA48398A | Multiple telegraphic apparatus |