| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | United States | 4 | |
| #3 | WIPO (World Intellectual Property Organization) | 4 | |
| #4 | Canada | 3 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Ships | |
| #2 | Bolts for doors or windows | |
| #3 | Unspecified technologies | |
| #4 | Dry-docking of vessels | |
| #5 | Belts or cables for driving |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kafka Robert S | 11 |
| #2 | Kafka Charles F | 11 |
| #3 | Kafka C | 4 |
| #4 | Kafka R | 4 |
| Publication | Filing date | Title |
|---|---|---|
| CA1146726A | Disappearing cleat or fitting | |
| US4354445A | Retractable lift ring | |
| EP0060836A1 | Disappearing cleat or fitting | |
| US4403799A | Flush hasp having foldable, upstanding latching portion, and optionally usable with padlock | |
| US4316626A | Flush hasp having dependent latching portion, and optionally usable with padlock | |
| US4270478A | Disappearing cleat or fitting |