| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 2 | |
| #3 | United Kingdom | 2 | |
| #4 | France | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Agriculture | |
| #5 | Weapons |
| # | Technology | |
|---|---|---|
| #1 | Winches | |
| #2 | Unspecified technologies | |
| #3 | Animal care | |
| #4 | Cranes | |
| #5 | Military vessels | |
| #6 | Railway shifting | |
| #7 | Ships |
| # | Name | Total Patents |
|---|---|---|
| #1 | Symonds Ralph F | 10 |
| #2 | Dorey Horace V | 1 |
| #3 | Frederick Symonds Ralph | 1 |
| #4 | Symonds William W | 1 |
| #5 | Symonds Ralph Frederick | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2679227A | Automatic diving device | |
| GB723045A | A new or improved winch | |
| US2671880A | Electric motor controlled winch | |
| US2489832A | Control circuit for hoisting devices | |
| US2503177A | Winch | |
| GB622478A | Improvements in or relating to winches | |
| US2506397A | Winoh with friction clutch | |
| US2464493A | Capstan | |
| US2083967A | Protected driving mechanism | |
| US2052674A | Motorized unit | |
| US1795978A | Gallows frame | |
| US1758722A | Towing block | |
| CA521550A | Electric motor controlled winch | |
| CA467910A | Winches |