| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Canada | 4 | |
| #3 | United Kingdom | 3 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering | |
| #3 | Mechanical elements | |
| #4 | Furniture and games | |
| #5 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Locks | |
| #3 | Office furniture | |
| #4 | Pipes | |
| #5 | Walking sticks | |
| #6 | Swimming pools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Petersen William | 11 |
| #2 | Petersen Mary A | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB0721584D0 | Grid tracker | |
| US4132236A | Tiltable collapsible umbrella and table combination | |
| US1088718A | Stovepipe or chimney thimble. | |
| US1042140A | Door-latch. | |
| US848847A | Fence-post. | |
| GB190522436A | Improvements relating to the Construction of Navigable Vessels. | |
| GB190501087A | Improvements in Navigable Vessels. | |
| US765593A | Latch. | |
| CA610311A | Latch means for plier type toggle wrench | |
| CA406022A | Wrench | |
| CA610306A | Releasing means for self-locking plier type toggle wrench | |
| CA518409A | Toggle locking wrenches |