| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 4 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Packaging and shipping | |
| #5 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Ships | |
| #2 | Unspecified technologies | |
| #3 | Winches | |
| #4 | Internal-combustion piston engines | |
| #5 | Geophysics | |
| #6 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Blackburn Walter L | 12 |
| Publication | Filing date | Title |
|---|---|---|
| GB1188445A | Improved Ratchet Winches or Hoists | |
| US3302931A | Ratchet winch | |
| US3285572A | Deck button | |
| US3292567A | Ratchet connector | |
| US3320686A | Ball drop | |
| US3105675A | Screw connector for barges or the like | |
| US3032021A | Opposed piston type engine | |
| US3000366A | Opposed piston engine | |
| CA880175A | Ratchet winch | |
| CA877012A | Wedge button | |
| CA799850A | Ratchet winch | |
| CA872670A | Roller button |