| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 4 | |
| #2 | United Kingdom | 4 | |
| #3 | Australia | 3 | |
| #4 | Italy | 3 | |
| #5 | Germany | 2 | |
| #6 | India | 2 | |
| #7 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Electric incandescent lamps | |
| #2 | Lighting device details | |
| #3 | Non-portable lighting devices | |
| #4 | Treatment of glass | |
| #5 | Electric discharge tubes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Morton Kenneth Leonard | 5 |
| #2 | Draper Geoffrey Roland | 3 |
| #3 | Drapper Geoffrey Roland | 1 |
| #4 | Morton K | 1 |
| #5 | Draper G | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1473381A | Bulb holder | |
| GB1477138A | Filament shields | |
| AU3841372A | Sealed beam lamps | |
| GB1377496A | Sealed beam lamps | |
| GB1058194A | Glass-to-metal joints |