| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 7 | |
| #2 | Canada | 4 | |
| #3 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping | |
| #3 | Transport | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Dredging | |
| #2 | Cranes | |
| #3 | Motor vehicles | |
| #4 | Unspecified technologies | |
| #5 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bannister Harold V | 7 |
| #2 | Schield Vern L | 2 |
| #3 | Zelle Lester L | 1 |
| #4 | Witwer Wallace J | 1 |
| #5 | Stevens Howard C Jr | 1 |
| #6 | Stevens Jr Howard C | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3037571A | Wide base crawler | |
| US2985317A | Ballast receptacles for cranes | |
| US2854294A | Crawler tumbler and track shoe | |
| US2755573A | Crane attachment | |
| US2809756A | Crane | |
| US2681205A | Hoist | |
| US2652640A | Detachable trench hoe spade | |
| CA565284A | Cranes | |
| CA549122A | Unitary hoist drum apparatus | |
| CA712922A | Drilling apparatus | |
| CA517219A | Detachable trench hoe spade |