| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 10 | |
| #2 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Measurement | |
| #3 | Machines | |
| #4 | Mechanical elements | |
| #5 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Coin-freed | |
| #2 | Special furniture | |
| #3 | Unspecified technologies | |
| #4 | Clutches and brakes | |
| #5 | Measuring volume |
| # | Name | Total Patents |
|---|---|---|
| #1 | Srodulski Joseph W | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US2255337A | Coin slide | |
| US2272683A | Vending machine | |
| US2272682A | Vending machine compartment structure | |
| US2249234A | Vending machine compartment means | |
| US2278676A | Coin control | |
| US2201655A | Dispensing machine | |
| US2212252A | Overload clutch | |
| US2254327A | Coin control | |
| US2193210A | Coin control unit | |
| US2285748A | Coin controlled attachment | |
| CA386432A | Coin control apparatus |