| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 5 | |
| #2 | Germany | 4 | |
| #3 | Switzerland | 3 | |
| #4 | France | 2 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Measurement | |
| #3 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Analysing materials | |
| #2 | Circuits for supplying electric power | |
| #3 | Telephonic communication |
| # | Name | Total Patents |
|---|---|---|
| #1 | Vigren Sten Daniel | 9 |
| #2 | Thielers Ernst Martin | 6 |
| #3 | Ackumulator-Fabriksaktiebolage | 3 |
| #4 | Sterner Nils Erik Bertil | 2 |
| #5 | Kaefsten Sven Harald | 2 |
| #6 | Ekstroem Gunnar Emanuel | 1 |
| #7 | Thielerd Ernst Martin | 1 |
| #8 | Daniel Vigren Sten | 1 |
| #9 | Ekstrom Gunnar Emmanuel | 1 |
| #10 | Kafsten Sven Harald | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE737006C | Signal araeometer | |
| US2239510A | System for charging a storage battery | |
| CH215212A | Accumulator battery charger. | |
| DE713294C | Relay device for automatic control of the charge of an auxiliary battery in telecommunications systems | |
| DE714595C | Circuit arrangement for cyclic charging of the series-connected groups of a collector battery permanently connected to electricity consumers | |
| DE656369C | Arrangement for the charging of electrical collector batteries |