| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Bolts for doors or windows | |
| #3 | Wing fittings | |
| #4 | Unspecified technologies | |
| #5 | Indexing scheme relating to hinges | |
| #6 | Locks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Johnson Elvin H | 12 |
| Publication | Filing date | Title |
|---|---|---|
| US2311278A | Builder's hardware | |
| US2171065A | Builder's hardware | |
| US2108891A | Door holder | |
| US1986677A | Builder's hardware | |
| US1966205A | Builder's hardware | |
| US1881635A | Doorstop | |
| US1906611A | Template for doorlocks | |
| US1896363A | Builder's hardware | |
| US1808897A | Builder's hardware | |
| US1851631A | Builder's hardware | |
| US1851630A | Builder's hardware | |
| CA356707A | Builder's hardware |