| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | Denmark | 3 | |
| #4 | Finland | 3 | |
| #5 | Canada | 2 | |
| #6 | Switzerland | 2 | |
| #7 | Germany | 2 | |
| #8 | United States | 2 | |
| #9 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Mechanical elements | |
| #3 | Electrical machinery and energy | |
| #4 | Optics |
| # | Technology | |
|---|---|---|
| #1 | Vehicle wheels | |
| #2 | Springs | |
| #3 | Cross-cutting vehicle technologies | |
| #4 | Lighting device details | |
| #5 | Shafts | |
| #6 | Cameras |
| # | Name | Total Patents |
|---|---|---|
| #1 | Huldt Kristoffer Andreas | 3 |
| #2 | Aktiebolaget Master-Regulator | 2 |
| #3 | Thorbjorn Salenius Carl Gustav | 2 |
| #4 | Andreas Huldt Kristoffer | 2 |
| #5 | Olof Koehler Nils | 1 |
| #6 | Huldt K A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB590877A | Improved wheel and axle assembly for rail vehicles | |
| GB575957A | Improvements in car wheel axles | |
| GB570918A | Improvements in and relating to car wheel assemblies | |
| DE857391C | Wheelset in which the wheel hubs and hollow axle consist of different parts | |
| US2094304A | Shock absorber | |
| GB432331A | Improvements in shock absorbers | |
| US2064496A | Shock absorber | |
| CA443829A | Car wheel axle | |
| CA469149A | Car wheel assemblies |