Mack Sands

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Westminster, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Redundant video alarm monitoring system
- Patent number 6,038,289
- Issue date Mar 14, 2000
- Simplex Time Recorder Co.
- Mack Sands
- G08 - SIGNALLING
Information Patent Grant
Redundant alarm monitoring system
- Patent number 5,862,201
- Issue date Jan 19, 1999
- Simplex Time Recorder Company
- Mack Sands
- G08 - SIGNALLING