Assignee
BOWMAN HAROLD M
US·24 granted patents·693 citations·filing 1976–1992
Top patents by PatentIndex Score
24 records- 0198US4203686AManhole constructionBOWMAN HAROLD M·Filed 1978·Granted May 20, 1980·84 cites·10 claims
- 0289US4281944AManhole cover supportBOWMAN HAROLD M·Filed 1979·Granted Aug 4, 1981·45 cites·9 claims
- 0387US4834574AUtility cover extensionBOWMAN HAROLD M·Filed 1987·Granted May 30, 1989·43 cites·4 claims
- 0486US4033372AFire hydrant locking deviceBOWMAN HAROLD M·Filed 1976·Granted Jul 5, 1977·39 cites·8 claims
- 0584US4927290AManhole cover support resistant to water infiltrationBOWMAN HAROLD M·Filed 1989·Granted May 22, 1990·46 cites·22 claims
- 0683US5051022AManhole cover support with topside flange and inclined seatBOWMAN HAROLD M·Filed 1990·Granted Sep 24, 1991·47 cites·29 claims
- 0782US4867600APolygonal manhole cover supportBOWMAN HAROLD M·Filed 1988·Granted Sep 19, 1989·41 cites·24 claims
- 0881US4872780AManhole cover support with box flangingBOWMAN HAROLD M·Filed 1988·Granted Oct 10, 1989·39 cites·32 claims
- 0980US4747739AIngot mold and methodBOWMAN HAROLD M·Filed 1986·Granted May 31, 1988·18 cites·6 claims
- 1077US4969770AManhole cover support with topside flangeBOWMAN HAROLD M·Filed 1989·Granted Nov 13, 1990·35 cites·27 claims
- 1177US4867601ASturdy adjustable manhole cover supportBOWMAN HAROLD M·Filed 1988·Granted Sep 19, 1989·35 cites·52 claims
- 1275US4358084ASectional ingot moldBOWMAN HAROLD M·Filed 1979·Granted Nov 9, 1982·12 cites·28 claims
- 1372US4969771AManhole cover support having enhanced gripBOWMAN HAROLD M·Filed 1989·Granted Nov 13, 1990·29 cites·30 claims
- 1469US5021261AProcess for making a manhole cover support having enhanced gripBOWMAN HAROLD M·Filed 1990·Granted Jun 4, 1991·30 cites·9 claims
- 1568US4416440AIngot mold and methodBOWMAN HAROLD M·Filed 1981·Granted Nov 22, 1983·11 cites·28 claims
- 1667US4269385ASectional ingot moldBOWMAN HAROLD M·Filed 1979·Granted May 26, 1981·9 cites·20 claims
- 1765US5165819AManhole cover support with flange borne on its own baseBOWMAN HAROLD M·Filed 1991·Granted Nov 24, 1992·25 cites·20 claims
- 1863US5143478AAdjustable manhole cover support with spannersBOWMAN HAROLD M·Filed 1991·Granted Sep 1, 1992·24 cites·37 claims
- 1955US5039248ASupport for catch basin coverBOWMAN HAROLD M·Filed 1990·Granted Aug 13, 1991·19 cites·28 claims
- 2050US5184912ASplit-ring manhole cover supportBOWMAN HAROLD M·Filed 1990·Granted Feb 9, 1993·18 cites·29 claims
- 2150US4966489AManhole cover support having interbraced top membersBOWMAN HAROLD M·Filed 1989·Granted Oct 30, 1990·11 cites·27 claims
- 2247US4963053AMulticomponent wales and bases for manhole cover supportsBOWMAN HAROLD M·Filed 1989·Granted Oct 16, 1990·12 cites·25 claims
- 2342US5326188AAnchor for manhole cover supportBOWMAN HAROLD M·Filed 1992·Granted Jul 5, 1994·11 cites·7 claims
- 2437US5150984AStiffening flanges for deformation resistance of manhole cover supportBOWMAN HAROLD M·Filed 1992·Granted Sep 29, 1992·10 cites·18 claims
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