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US3094163A
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Counterweighted upward acting door
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US3000203A
|
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Lock mechanism
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US2898985A
|
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Dual door mechanism
|
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US2805107A
|
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Nylon roller assembly
|
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US2886102A
|
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Multi-section upward acting door
|
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US2757054A
|
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Nylon roller bearing roller assembly
|
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US2655684A
|
|
Roller construction
|
|
US2537155A
|
|
Electric motor indexing and reversing circuit
|
|
US2538626A
|
|
Upward acting door construction
|
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US2453432A
|
|
Cable clamp
|
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US2557753A
|
|
Sectional door construction
|
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US2603842A
|
|
Tilting door assembly
|
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US2612396A
|
|
Lock for upward acting doors
|
|
US2539200A
|
|
Overhead door mounting
|
|
US2596792A
|
|
Metal door
|
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US2399169A
|
|
Door construction
|
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US2552752A
|
|
Upward acting door construction
|
|
US2348386A
|
|
Upward acting door construction
|
|
US2284427A
|
|
Roller construction
|
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US2288711A
|
|
Resilient cable actuated door
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