Inventor · disambiguated record
Harold M. Bowman
Also filed as: BOWMAN HAROLD M
31 granted patents·984 citations·filing 1974–1997
98Inventor score
Top patents by PatentIndex Score
31 records- 0198US4203686AManhole constructionBOWMAN HAROLD M·Filed 1978·Granted May 20, 1980·84 cites·10 claims
- 0292US5697729AAnchor for utility access hole support insertFiled 1995·Granted Dec 16, 1997·71 cites·15 claims
- 0389US4281944AManhole cover supportBOWMAN HAROLD M·Filed 1979·Granted Aug 4, 1981·45 cites·9 claims
- 0487US4834574AUtility cover extensionBOWMAN HAROLD M·Filed 1987·Granted May 30, 1989·43 cites·4 claims
- 0586US6007270AManhole frame assemblyFiled 1997·Granted Dec 28, 1999·72 cites·26 claims
- 0686US4033372AFire hydrant locking deviceBOWMAN HAROLD M·Filed 1976·Granted Jul 5, 1977·39 cites·8 claims
- 0785US5628152AAdjustable manhole cover support with shieldFiled 1995·Granted May 13, 1997·73 cites·21 claims
- 0884US4927290AManhole cover support resistant to water infiltrationBOWMAN HAROLD M·Filed 1989·Granted May 22, 1990·46 cites·22 claims
- 0983US5051022AManhole cover support with topside flange and inclined seatBOWMAN HAROLD M·Filed 1990·Granted Sep 24, 1991·47 cites·29 claims
- 1082US4867600APolygonal manhole cover supportBOWMAN HAROLD M·Filed 1988·Granted Sep 19, 1989·41 cites·24 claims
- 1181US4872780AManhole cover support with box flangingBOWMAN HAROLD M·Filed 1988·Granted Oct 10, 1989·39 cites·32 claims
- 1280US4747739AIngot mold and methodBOWMAN HAROLD M·Filed 1986·Granted May 31, 1988·18 cites·6 claims
- 1377US4969770AManhole cover support with topside flangeBOWMAN HAROLD M·Filed 1989·Granted Nov 13, 1990·35 cites·27 claims
- 1477US4867601ASturdy adjustable manhole cover supportBOWMAN HAROLD M·Filed 1988·Granted Sep 19, 1989·35 cites·52 claims
- 1575US4358084ASectional ingot moldBOWMAN HAROLD M·Filed 1979·Granted Nov 9, 1982·12 cites·28 claims
- 1672US4969771AManhole cover support having enhanced gripBOWMAN HAROLD M·Filed 1989·Granted Nov 13, 1990·29 cites·30 claims
- 1769US5021261AProcess for making a manhole cover support having enhanced gripBOWMAN HAROLD M·Filed 1990·Granted Jun 4, 1991·30 cites·9 claims
- 1868US4416440AIngot mold and methodBOWMAN HAROLD M·Filed 1981·Granted Nov 22, 1983·11 cites·28 claims
- 1967US4269385ASectional ingot moldBOWMAN HAROLD M·Filed 1979·Granted May 26, 1981·9 cites·20 claims
- 2065US5165819AManhole cover support with flange borne on its own baseBOWMAN HAROLD M·Filed 1991·Granted Nov 24, 1992·25 cites·20 claims
- 2163US5143478AAdjustable manhole cover support with spannersBOWMAN HAROLD M·Filed 1991·Granted Sep 1, 1992·24 cites·37 claims
- 2260USRE34550ESturdy adjustable manhole cover supportFiled 1992·Granted Feb 22, 1994·22 cites·56 claims
- 2360US3968600AAdjustable manhole cover support structureNAT UTILITY PRODUCTS COMPANY·Filed 1974·Granted Jul 13, 1976·19 cites·8 claims
- 2457US4236358AAdjustable manhole cover support structureNAT UTILITY PRODUCTS COMPANY·Filed 1978·Granted Dec 2, 1980·16 cites·12 claims
- 2555US5039248ASupport for catch basin coverBOWMAN HAROLD M·Filed 1990·Granted Aug 13, 1991·19 cites·28 claims
- 2653US5611640AMethod and apparatus for anchoring a utility grate coverFiled 1995·Granted Mar 18, 1997·18 cites·12 claims
- 2750US5184912ASplit-ring manhole cover supportBOWMAN HAROLD M·Filed 1990·Granted Feb 9, 1993·18 cites·29 claims
- 2850US4966489AManhole cover support having interbraced top membersBOWMAN HAROLD M·Filed 1989·Granted Oct 30, 1990·11 cites·27 claims
- 2947US4963053AMulticomponent wales and bases for manhole cover supportsBOWMAN HAROLD M·Filed 1989·Granted Oct 16, 1990·12 cites·25 claims
- 3042US5326188AAnchor for manhole cover supportBOWMAN HAROLD M·Filed 1992·Granted Jul 5, 1994·11 cites·7 claims
- 3137US5150984AStiffening flanges for deformation resistance of manhole cover supportBOWMAN HAROLD M·Filed 1992·Granted Sep 29, 1992·10 cites·18 claims
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