| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 6 | |
| #2 | Germany | 2 | |
| #3 | Ireland | 1 | |
| #4 | Netherlands | 1 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Writing or drawing tools | |
| #2 | Spraying devices | |
| #3 | Books |
| # | Name | Total Patents |
|---|---|---|
| #1 | Henriksen Ernst Johan Jens | 3 |
| Publication | Filing date | Title |
|---|---|---|
| GB1113625A | Methods of inserting fluent materials into pen reservoirs | |
| US3424537A | Fountain pen structures | |
| GB936914A | Ball point writing instrument | |
| GB837282A | Improvements in and relating to writing tips for ball point pens | |
| IE21476L | Ball point pens. | |
| GB772744A | Improvements relating to ball point pens | |
| GB669973A | Improvements in or relating to writing instruments | |
| GB480088A | Improved roll-form memorandum device |