| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 61 | |
| #2 | Germany | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Civil engineering | |
| #3 | Furniture and games | |
| #4 | Machine tools | |
| #5 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Unspecified technologies | |
| #2 | Locks | |
| #3 | Unspecified technologies | |
| #4 | Office furniture | |
| #5 | Milling | |
| #6 | Bolts for doors or windows | |
| #7 | Household appliances | |
| #8 | Doors and windows | |
| #9 | Hinges for doors or windows | |
| #10 | Electric switches |
| # | Name | Total Patents |
|---|---|---|
| #1 | Keil Henry F | 27 |
| #2 | Herman Hansen | 12 |
| #3 | Sigurd Brantingson | 11 |
| #4 | Adam Schoorel | 6 |
| #5 | Joseph Fetyk | 2 |
| #6 | John Holtzman | 1 |
| #7 | Felix Staedeli | 1 |
| #8 | Fetyk Joseph F | 1 |
| #9 | Knieszner William T | 1 |
| #10 | Dowling Francis J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2225545A | Lock construction | |
| US2192371A | Lock construction | |
| US2174413A | Pickproof lock construction | |
| US2161757A | Door latch and striker construction | |
| US2135323A | Lock construction | |
| US2135322A | Lock construction | |
| US2078002A | Attachment for doors | |
| US2116965A | Padlock construction | |
| US2083140A | Hinge construction | |
| US2066278A | Electric door release mechanism | |
| US2077140A | Door lock construction | |
| US2066277A | Electrically-releasable bolt keeper | |
| US2074979A | Latch and striker construction | |
| US2060760A | Bracket construction | |
| US2087554A | Lock construction | |
| US2014233A | Lock construction | |
| US2007143A | Lock construction | |
| US2094604A | Lock construction | |
| US2047969A | Lock construction | |
| US2048507A | Lock construction |