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Roland C. Wright
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Roseville, CA, US
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last 30 patents
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Patent Grant
Tank cover access hatch with safety barrier
Patent number
10,329,812
Issue date
Jun 25, 2019
Hallsten Corporation
Jeffrey A. Hallsten
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Patent Grant
Slide lock for hatch on gas containment cover
Patent number
10,227,799
Issue date
Mar 12, 2019
Hallsten Corporation
Jeffrey A. Hallsten
E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Patent Grant
Dock structure
Patent number
5,845,594
Issue date
Dec 8, 1998
Hallsten Corporation
John Hallsten
B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT