| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 3 | |
| #2 | Denmark | 3 | |
| #3 | United States | 3 | |
| #4 | United Kingdom | 2 | |
| #5 | Canada | 1 | |
| #6 | Switzerland | 1 | |
| #7 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Electrical machinery and energy | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Internal-combustion piston engines | |
| #2 | Supplying combustion engines | |
| #3 | Dynamo-electric machines | |
| #4 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Berglund Otto Robert Percival | 12 |
| #2 | Hesselman Bror Oskar Walter | 1 |
| #3 | Hjorth Walter Axel Wilhelm Emanuel | 1 |
| #4 | Hesselmann Bror Oskar Walter | 1 |
| #5 | Robert Percival Berglund Otto | 1 |
| #6 | Ljungman Carl Ernst | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB191407433A | Improvements in connection with Fuel Injection Devices for Internal Combustion Engines. | |
| GB191406205A | Improvements in and relating to Two-stroke Cycle Internal Combustion Engines. | |
| US1162967A | Two-cycle internal-combustion engine. | |
| US877284A | Electric apparatus for the ignition of mines. | |
| US757014A | Friction-gearing. | |
| CA252472A | Reciprocating engine having oscillating piston rings |