| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 8 | |
| #2 | Austria | 2 | |
| #3 | Canada | 2 | |
| #4 | Denmark | 2 | |
| #5 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Telecommunications | |
| #3 | Electrical machinery and energy | |
| #4 | Computer technology | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Telephonic communication | |
| #2 | Loudspeakers and microphones | |
| #3 | Electric switches | |
| #4 | Measuring electric variables | |
| #5 | Counting mechanisms |
| # | Name | Total Patents |
|---|---|---|
| #1 | Stromberg Alfred | 16 |
| #2 | Willis George Marpole | 7 |
| #3 | Carlson Andrew | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA142499A | Electric meter | |
| GB191004273A | Improvements in or relating to Electric Meters. | |
| GB191002275A | Improvements in or relating to Counting Apparatus for Meters and the like. | |
| US910603A | Telephone-receiver. | |
| US684007A | Circuit-protector. | |
| US662987A | Circuit-protector. | |
| US659940A | Telephone-switch. | |
| US662986A | Telephone-exchange system and apparatus. | |
| US662985A | Telephone-transmitter. | |
| US643830A | Telephone-transmitter. | |
| US662984A | Telephone-exchange system. | |
| CA47040A | Magneto telephone apparatus |