| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 8 | |
| #2 | Japan | 5 | |
| #3 | Italy | 4 | |
| #4 | United States | 4 | |
| #5 | Canada | 3 | |
| #6 | Germany | 2 | |
| #7 | Sweden | 2 | |
| #8 | China | 1 | |
| #9 | Denmark | 1 | |
| #10 | Finland | 1 | |
| #11 | Netherlands | 1 | |
| #12 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Measurement | |
| #2 | Machine tools | |
| #3 | Transport | |
| #4 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rahn Armin | 7 |
| #2 | Christoph Peter | 3 |
| #3 | Finnern Gerd | 2 |
| #4 | Schuster J | 2 |
| #5 | Hoelting Johann-Peter | 2 |
| #6 | Geruto Fuinnerun | 1 |
| #7 | Zerver Hermann J | 1 |
| #8 | Roorentsu Shiyunaideru | 1 |
| #9 | Hoelting J-P | 1 |
| #10 | Arumin Raan | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5031327A | Apparatus for fine adjustment of a sextant | |
| FR2400823A7 | LIQUID COMPASS | |
| US4193432A | Self-steering apparatus for ships | |
| FR847815A | By-hydraulically damped compass | |
| FR831198A | Hydraulic damping compass | |
| FR810017A | Sextant | |
| CA521428A | Gyro-compasses | |
| CA552862A | Gyroscope suspension | |
| CA572781A | Frictionless couplings |