| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Germany | 4 | |
| #3 | Canada | 3 | |
| #4 | France | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Locks | |
| #2 | Unspecified technologies | |
| #3 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Meade Wildrick | 4 |
| #2 | Denerich Anthony J | 3 |
| #3 | Hatch Alexander G | 3 |
| #4 | Hatch Alexander Gilchrist | 2 |
| #5 | Gilchrist Hatch Alexander | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2119704A | Permutation lock | |
| US1964936A | Permutation lock | |
| US1781510A | Permutation lock | |
| GB270726A | Locks | |
| US1690818A | Lock | |
| US1640935A | Lock | |
| US1656882A | Lock | |
| US1606279A | Lock | |
| US1604866A | Keyless lock | |
| US1606701A | Antipicking device for keyless locks | |
| US1613550A | Keyless lock | |
| CA348211A | Permutation lock | |
| CA281845A | Lock | |
| CA303873A | Permutation lock |