| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Norway | 5 | |
| #2 | Canada | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | Germany | 1 | |
| #5 | Denmark | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Ships | |
| #2 | Unspecified technologies | |
| #3 | Belts or cables for driving | |
| #4 | Nails | |
| #5 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hystad Per H | 9 |
| #2 | Hystad Per Helge | 3 |
| #3 | Hystad Harald | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB9323888D0 | A seine ring device | |
| US4603649A | Closeable restraint for maintaining a tow line between guide pins on a boat | |
| CA1174122A | Stop assembly for securing a buoy line connecting a mooring anchor to the associated buoy |