David D. Ketchum

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Ipswich, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Burner flame detection
- Patent number 4,280,184
- Issue date Jul 21, 1981
- Electronic Corporation of America
- Nathan K. Weiner
- F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information Patent Grant
Interface circuit for use with electronic control devices
- Patent number 4,272,725
- Issue date Jun 9, 1981
- Electronics Corporation of America
- Nathan K. Weiner
- H01 - BASIC ELECTRIC ELEMENTS