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Pressure-fit gate
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Patent number 5,535,552
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Issue date Jul 16, 1996
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Innova Development Corporation
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Carl M. Stern
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Security gate operable with one hand
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Patent number 5,052,461
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Issue date Oct 1, 1991
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Innova Development Corporation
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Carl M. Stern
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Security gate operable with one hand
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Patent number 4,968,071
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Issue date Nov 6, 1990
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Innova Development Corporation
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Carl M. Stern
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Security gate operable with one hand
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Patent number 4,846,246
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Issue date Jul 11, 1989
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Innova Development Corporation
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Carl M. Stern
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS