May be covered by one or more of the following: U.S. Patents #4538297, 4647876, 4696044, 4745309,
4881047, 4893099, 5124657, 5263091, 5268527, 5319713, 5333201, 5402498 and 5493617.
Other patents pending. Foreign patents pending.
Short Timer Retro Digital Delay Instruction Manual
RETRO
DIGITAL DELAY