Inventor · disambiguated record
Humfrey N. Udall
Also filed as: UDALL HUMFREY N
12 granted patents·111 citations·filing 1977–1989
90Inventor score
Files withTHERMATOOL CORP12
Top patents by PatentIndex Score
12 records- 0174US4278868AMethods and apparatus for heating metal parts with magnetically driven travelling electric arcTHERMATOOL CORP·Filed 1979·Granted Jul 14, 1981·21 cites·5 claims
- 0266US4215259ASurface hardening of metals using electric currentsTHERMATOOL CORP·Filed 1978·Granted Jul 29, 1980·12 cites·26 claims
- 0365US4234776AMethod of producing areas of alloy metal on a metal part using electric currentsTHERMATOOL CORP·Filed 1978·Granted Nov 18, 1980·16 cites·27 claims
- 0461US4916278ASevering metal strip with high frequency electrical currentTHERMATOOL CORP·Filed 1989·Granted Apr 10, 1990·16 cites·12 claims
- 0555US4219722AMethods and apparatus for heating metal parts with magnetically driven travelling electric arcTHERMATOOL CORP·Filed 1977·Granted Aug 26, 1980·11 cites·59 claims
- 0649US4845326AApparatus and method for electrically butt welding of skelp edge faces which have been preheatedTHERMATOOL CORP·Filed 1987·Granted Jul 4, 1989·12 cites·13 claims
- 0748US4081648AHigh frequency in-line, electrical welding apparatus for small diameter metal tubingTHERMATOOL CORP·Filed 1977·Granted Mar 28, 1978·8 cites·14 claims
- 0840US4241284AElectrical contact apparatus for high frequency weldingTHERMATOOL CORP·Filed 1978·Granted Dec 23, 1980·5 cites·18 claims
- 0939US4233484AHigh frequency current welding of metal strip to a metal partTHERMATOOL CORP·Filed 1978·Granted Nov 11, 1980·5 cites·19 claims
- 1033US4339654AMethods for the manufacture of heat exchanger panelsTHERMATOOL CORP·Filed 1980·Granted Jul 13, 1982·4 cites·7 claims
- 1129US4277871AHeat exchanger panels and method of manufactureTHERMATOOL CORP·Filed 1980·Granted Jul 14, 1981·1 cites·5 claims
- 1227US4287947ASolar panel elements and method of manufacture thereofTHERMATOOL CORP·Filed 1980·Granted Sep 8, 1981·0 cites·3 claims
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