| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 206 | |
| #2 | Canada | 24 | |
| #3 | United Kingdom | 8 | |
| #4 | France | 7 | |
| #5 | Germany | 6 | |
| #6 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Agriculture | |
| #2 | Machines | |
| #3 | Materials and metallurgy | |
| #4 | Transport | |
| #5 | Mechanical elements | |
| #6 | Medical technology | |
| #7 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Crop agriculture | |
| #2 | Planting | |
| #3 | Unspecified technologies | |
| #4 | Foundry moulding | |
| #5 | Belts or cables for driving | |
| #6 | Vehicle connections | |
| #7 | Medical purpose containers | |
| #8 | Casting metal | |
| #9 | Vehicle transmission mounting | |
| #10 | Dredging |
| # | Name | Total Patents |
|---|---|---|
| #1 | Altgelt Rudolph J | 41 |
| #2 | Heylman Edward M | 37 |
| #3 | Paul William L | 36 |
| #4 | Davis Calvin R | 23 |
| #5 | Altgelt Herman E | 17 |
| #6 | Springer William N | 11 |
| #7 | Dewend William D | 10 |
| #8 | Heylman Edward Mordecai | 10 |
| #9 | Gallagher Arthur D | 9 |
| #10 | Altgelt Rudolph Joseph | 7 |
| Publication | Filing date | Title |
|---|---|---|
| US1727852A | Plow | |
| US1719743A | Tractor plow structure | |
| US1686546A | Cultivator | |
| US1671662A | Plow | |
| US1618693A | Plow | |
| US1600085A | Planting machine | |
| US1684218A | Cultivator | |
| US1684211A | Planter | |
| US1642801A | Cultivator | |
| US1669080A | Harrow | |
| US1590665A | Wheeled cultivator | |
| US1613597A | Hitch device | |
| US1590664A | Wheeled cultivator | |
| US1655351A | Hitch or clevis structure | |
| US1611707A | Cultivator | |
| US1703051A | Harrow | |
| US1652287A | Plow | |
| US1550062A | Disk harrow | |
| US1639768A | Cultivator | |
| GB239392A | Improvements in and relating to adjusting devices for ploughs |