ED SPENGLER ET H CHENU has a total of 15 patent applications. Its first patent ever was published in 1920. It filed its patents most often in France and United Kingdom. Its main competitors in its focus markets electrical machinery and energy are MIANYANG LEIDICHUANG MICROELECTRONICS CO LTD, XIAMEN TAIHANG TECHNOLOGY CO LTD and ADRIAN MEDERT.
| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 14 | |
| #2 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Electric switches | |
| #2 | Electrically-conductive connections |
| Publication | Filing date | Title |
|---|---|---|
| GB169459A | Improvements in and relating to electric switches |