Assignee
SCHONSTEDT INSTRUMENT CO
28 granted patents·1,898 citations·filing 1974–2003
Top patents by PatentIndex Score
28 records- 0195US4639674AApparatus and method employing extraneous field compensation for locating current-carrying objectsSCHONSTEDT INSTRUMENT CO·Filed 1983·Granted Jan 27, 1987·139 cites·16 claims
- 0295US4258320AApparatus and method employing foam sleeves for supporting magnetic sensors in a tubular housingSCHONSTEDT INSTRUMENT CO·Filed 1978·Granted Mar 24, 1981·70 cites·12 claims
- 0394US5006806AMethods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as burried fiber optic cablesSCHONSTEDT INSTRUMENT CO·Filed 1989·Granted Apr 9, 1991·152 cites·15 claims
- 0493US6356082B1Utility locator radio linkSCHONSTEDT INSTRUMENT CO·Filed 2000·Granted Mar 12, 2002·127 cites·19 claims
- 0593US4803773AMethod of making magnetic coresSCHONSTEDT INSTRUMENT CO·Filed 1986·Granted Feb 14, 1989·77 cites·14 claims
- 0692US4839624AMagnetic coresSCHONSTEDT INSTRUMENT CO·Filed 1988·Granted Jun 13, 1989·50 cites·11 claims
- 0792US4818944AMagnetic locating and tracing system and method using dual-antenna transmitter to distinguish between concealed adjacent objectsSCHONSTEDT INSTRUMENT CO·Filed 1987·Granted Apr 4, 1989·97 cites·24 claims
- 0891US5017873AMethods and apparatus employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cablesSCHONSTEDT INSTRUMENT CO·Filed 1990·Granted May 21, 1991·130 cites·45 claims
- 0991US4839623AMagnetic core blanks of magnetically permeable sheet materialSCHONSTEDT INSTRUMENT CO·Filed 1988·Granted Jun 13, 1989·60 cites·6 claims
- 1090US5114517AMethods, apparatus and devices relating to magnetic markers for elongated hidden objectsSCHONSTEDT INSTRUMENT CO·Filed 1990·Granted May 19, 1992·106 cites·24 claims
- 1190US4388592AMultiaxis magnetometer apparatus with orthogonally disposed rectangular housings for mounting separate sensor assembliesSCHONSTEDT INSTRUMENT CO·Filed 1980·Granted Jun 14, 1983·55 cites·16 claims
- 1289US5122750AMethods employing permanent magnets for marking, locating, tracing and identifying hidden objects such as buried fiber optic cablesSCHONSTEDT INSTRUMENT CO·Filed 1991·Granted Jun 16, 1992·107 cites·21 claims
- 1389US4539522AMagnetic detector apparatus with liquid-supported, conductive, sensor-support tubeSCHONSTEDT INSTRUMENT CO·Filed 1982·Granted Sep 3, 1985·49 cites·5 claims
- 1488US6819109B2Magnetic detector extendable wandSCHONSTEDT INSTRUMENT CO·Filed 2003·Granted Nov 16, 2004·119 cites·20 claims
- 1588US5097211AMagnetic detection appartaus with plastic housing and sound-transmissive handleSCHONSTEDT INSTRUMENT CO·Filed 1990·Granted Mar 17, 1992·81 cites·14 claims
- 1688US4590425AMagnetic detector apparatus with excitation conductors connected in series via sensor housingSCHONSTEDT INSTRUMENT CO·Filed 1985·Granted May 20, 1986·52 cites·4 claims
- 1787US5206065AMethods, apparatus and devices relating to magnetic markers for elongated hidden objectsSCHONSTEDT INSTRUMENT CO·Filed 1992·Granted Apr 27, 1993·81 cites·1 claims
- 1886US4747207AManufacture of magnetic cores from blanks of magnetically permeable sheet materialSCHONSTEDT INSTRUMENT CO·Filed 1986·Granted May 31, 1988·54 cites·6 claims
- 1985US5239290AMagnetic cores for saturable core measuring devices and methods of manufacturing such coresSCHONSTEDT INSTRUMENT CO·Filed 1992·Granted Aug 24, 1993·38 cites·14 claims
- 2081US5173139AMethod for providing magnetic markers on elongated hidden objectsSCHONSTEDT INSTRUMENT CO·Filed 1992·Granted Dec 22, 1992·54 cites·8 claims
- 2181US4536710AMagnetic detector instrument with board-mounted sensor assemblySCHONSTEDT INSTRUMENT CO·Filed 1982·Granted Aug 20, 1985·58 cites·6 claims
- 2276US3961245AMagnetic locator having improved sensorsSCHONSTEDT INSTRUMENT CO·Filed 1974·Granted Jun 1, 1976·19 cites·20 claims
- 2375US5136245AMagnetic detection apparatus with sensors mounted on channel or angle cantilever supportSCHONSTEDT INSTRUMENT CO·Filed 1991·Granted Aug 4, 1992·45 cites·1 claims
- 2473USD255552SMagnetic locatorSCHONSTEDT INSTRUMENT CO·Filed 1978·Granted Jun 24, 1980·10 cites·1 claims
- 2571US5138761AMethod of manufacturing magnetic detection apparatusSCHONSTEDT INSTRUMENT CO·Filed 1991·Granted Aug 18, 1992·41 cites·3 claims
- 2658US4110689AMagnetic detecting apparatus with novel means for positioning sensor assembly in a housingSCHONSTEDT INSTRUMENT CO·Filed 1977·Granted Aug 29, 1978·12 cites·4 claims
- 2756USD496292SMagnetic detector with extendable wandSCHONSTEDT INSTRUMENT CO·Filed 2003·Granted Sep 21, 2004·11 cites·1 claims
- 2834US3977072AMethod of manufacturing a magnetic locatorSCHONSTEDT INSTRUMENT CO·Filed 1975·Granted Aug 31, 1976·4 cites·7 claims
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