| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 16 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines | |
| #3 | Transport | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Locks | |
| #3 | Bolts for doors or windows | |
| #4 | Vehicle signalling and lighting | |
| #5 | Pumps |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carl Hoffman | 15 |
| #2 | Johnson John Webster | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2405887A | Refrigerator door opener | |
| US1796891A | Doorlock | |
| US1548269A | Door fastener | |
| US1548270A | Door fastener | |
| US1516433A | Automobile signal | |
| US1478857A | Automobile signal | |
| US1553531A | Latch lock for doors | |
| US1530671A | Lock device for doors | |
| US1530672A | Lock | |
| US1553532A | Latch and lock for doors | |
| US1383632A | Automobile-signal | |
| US1383631A | Lock | |
| US1388713A | Lock | |
| US1388712A | Door-bolt | |
| US1388711A | Lock | |
| US656740A | Valve for hydraulic motors. |