Ralph K. Day

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Maumee, OH, US

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Patents Grantslast 30 patents

Information Patent Grant
Double glass sheet insulating windows
- Patent number 4,542,611
- Issue date Sep 24, 1985
- Ralph K. Day
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Multiple pane insulating structure having means for removing moistu...
- Patent number 4,394,806
- Issue date Jul 26, 1983
- Ralph K. Day
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Replaceable double glazed window defogging appliance and window str...
- Patent number 4,065,894
- Issue date Jan 3, 1978
- Ralph K. Day
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
Information Patent Grant
Window construction
- Patent number 3,932,971
- Issue date Jan 20, 1976
- Ralph K. Day
- E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS