| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 4 | |
| #2 | Austria | 3 | |
| #3 | Canada | 3 | |
| #4 | Switzerland | 1 | |
| #5 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Sound-producing devices | |
| #2 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dean William Warren | 10 |
| #2 | William Warren Dean | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB191405346A | Improvements in or relating to Electric Diaphragm Horns or Alarms. | |
| GB191405347A | Improvements in or relating to Electric Diaphragm Horns or Alarms. | |
| GB191403706A | Improvements in and relating to Electrical Switches for Automobiles and other purposes. | |
| CA94859A | Telephone toll line system | |
| GB190401242A | Improvement in Party Line Telephone Systems. | |
| CA92404A | Telephone system | |
| CA83273A | Relay |