| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 12 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Mechanical elements | |
| #3 | Civil engineering | |
| #4 | Engines, pumps and turbines | |
| #5 | Textiles and paper |
| # | Technology | |
|---|---|---|
| #1 | Winches | |
| #2 | Clutches and brakes | |
| #3 | Dredging | |
| #4 | Cranes | |
| #5 | Mechanical carpet cleaning | |
| #6 | Non-positive-displacement pumps | |
| #7 | Gearing | |
| #8 | Lifting and pushing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kittredge John W | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2168164A | Speed reducer | |
| US2125615A | Flexible coupling for shafting | |
| US1976131A | Flexible coupling for shafting | |
| US1748775A | Bag turning and cleaning machine | |
| US1588115A | Hoisting block | |
| US1541267A | Hoisting block | |
| US1496273A | Hoisting block | |
| US1384960A | Derrick | |
| US1264811A | Excavating-bucket. | |
| US1333852A | Tooth construction for digging-buckets | |
| US1110696A | Centrifugal compressor. | |
| US860750A | Mining-column. |