| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 11 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Transport | |
| #3 | Machines | |
| #4 | Telecommunications | |
| #5 | Digital networks | |
| #6 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Registering devices | |
| #2 | Coin-freed | |
| #3 | Unspecified technologies | |
| #4 | Cycle stands | |
| #5 | Vehicle parts | |
| #6 | Selecting | |
| #7 | Digital information transmission | |
| #8 | Locks | |
| #9 | Control or regulating systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Denison William D | 11 |
| #2 | Silvers Bradley S | 10 |
| #3 | Brownfield Lawrence C | 9 |
| #4 | Brownfield Lawrence D | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2004201449A1 | Vending machines with field-programmable locks | |
| US2003234719A1 | Vending machines with field-programmable locks | |
| US2002097141A1 | Electronic access control device | |
| US5617082A | Electronic access control device utilizing a single microcomputer integrated circuit |