| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 3 | |
| #4 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Electrical machinery and energy | |
| #3 | Machines | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Emergency protective circuit arrangements | |
| #3 | Unspecified technologies | |
| #4 | Laundering textiles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Igino Guiducci | 3 |
| #2 | Guiducci Igino | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB447240A | Improvements in washers for locking nuts | |
| US2124249A | Locking washer for nuts | |
| US1666375A | Lock nut | |
| GB221710A | Improvements in electric hand irons | |
| GB220856A | Improvements in automatic safety devices for protecting low tension electric circuits |