| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | United Kingdom | 4 | |
| #3 | Switzerland | 1 | |
| #4 | Germany | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Electric switches | |
| #2 | Nails | |
| #3 | Unspecified technologies | |
| #4 | Portable lighting devices | |
| #5 | Lighting device details |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lenning Alvar | 1 |
| #2 | Lasmutter Aktiebolaget Svenska | 1 |
| #3 | Erhard Meyer Sven Fredrik | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB751647A | Improvements in electric battery lamps | |
| US2583434A | Timing device | |
| GB609654A | Improvements in or relating to time switches | |
| GB372405A | Improvements in locking devices for stud-bolts and similar screw connections | |
| GB296636A | Improvements in or relating to lock nuts |