Ohbayashi-Gumi, Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4751800 Openable dome-shaped roof structureExpiredJun 25, 86Jun 21, 88[E04B]
4727688 Retractable roof structureExpiredOct 22, 86Mar 01, 88[E04H]
4715726 Method of measuring the strength of concrete for slip form processExpiredJun 23, 86Dec 29, 87[G01N]
4706419 Openable dome-shaped roof structureExpiredJun 25, 86Nov 17, 87[E04B]
4653674 Device for dispensing goods through annular dispensing portExpiredJun 09, 81Mar 31, 87[B65G]
4565039 Floor structure for reducing vibrationExpiredMar 07, 84Jan 21, 86[E02D, E04H]
4551256 Slurry excavating methodExpiredJun 02, 82Nov 05, 85[C09K]
4361254 Hopper for storing free flowing solid materialExpiredNov 19, 80Nov 30, 82[B65G]
4266885 Method of constructing a continuous cut-off wall and a core of a fill-type damExpiredOct 12, 78May 12, 81[E02B, E02D]
4209268 Tail packing for a slurry pressurized shieldExpiredFeb 21, 78Jun 24, 80[E01G]
4205040 Exposed aggregate finishing method for concreteExpiredOct 22, 75May 27, 80[B28B]

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