| 7053773 |
Vending audit system |
Kevin Rabinovitch, Cary Sagady, Darren Walker |
2006-05-30 |
| 6339731 |
Configurable vending machine audit module |
Matthew Morris |
2002-01-15 |
| 6259211 |
Vending machine fluorescent tube monitor |
— |
2001-07-10 |
| 6044952 |
Multi-function optical sensor for a document acceptor |
Chad C. Haggerty, Edward M. Zoladz, Jr. |
2000-04-04 |
| 6038491 |
Monitoring and reporting system using cellular carriers |
Philip Rene Reger |
2000-03-14 |
| 5907141 |
Use of security coupons in connection with locking mechanisms for vending and gaming machines |
David C. Deaville, Robert D. Ross |
1999-05-25 |
| 4995110 |
Method and apparatus for keyboard adaptation to a low power controller in a coin operated telephone |
— |
1991-02-19 |
| 4989239 |
Method and apparatus for preventing pay telephone fraud and reducing handset vandalism |
— |
1991-01-29 |
| 4985910 |
Method and apparatus for retrofitting a standard coin operated telephone employing a carbon microphone with a line powered electronic controller |
— |
1991-01-15 |
| 4928299 |
Coin operated telephone operation monitoring switch mounting arrangement |
John L. Tansky, Edward F. Lagan, Jr. |
1990-05-22 |
| 4926458 |
Low power control apparatus for a coin operated telephone |
Philip Rene Reger, Craig Lewis |
1990-05-15 |
| 4193225 |
Auxiliary window element |
Louis L. Posner |
1980-03-18 |