Inventor · disambiguated record
Howard R. Harker
Also filed as: HARKER HOWARD R
12 granted patents·422 citations·filing 1985–1991
93Inventor score
Top patents by PatentIndex Score
12 records- 0195US4961776ACold hearth refiningJOHNSON AXEL METALS·Filed 1989·Granted Oct 9, 1990·44 cites·5 claims
- 0295US4936375AContinuous casting of ingotsJOHNSON AXEL METALS·Filed 1989·Granted Jun 26, 1990·44 cites·20 claims
- 0395US4838340AContinuous casting of fine grain ingotsJOHNSON AXEL METALS·Filed 1988·Granted Jun 13, 1989·59 cites·25 claims
- 0493US5222547AIntermediate pressure electron beam furnaceJOHNSON AXEL METALS·Filed 1991·Granted Jun 29, 1993·53 cites·10 claims
- 0593US5100463AMethod of operating an electron beam furnaceJOHNSON AXEL METALS·Filed 1990·Granted Mar 31, 1992·37 cites·3 claims
- 0693US4932635ACold hearth refining apparatusJOHNSON AXEL METALS·Filed 1988·Granted Jun 12, 1990·50 cites·5 claims
- 0790US5291940AStatic vacuum casting of ingotsJOHNSON AXEL METALS·Filed 1991·Granted Mar 8, 1994·51 cites·12 claims
- 0880US4823358AHigh capacity electron beam cold hearth furnaceJOHNSON AXEL METALS·Filed 1988·Granted Apr 18, 1989·27 cites·12 claims
- 0979US4750542AElectron beam cold hearth refiningJOHNSON METALS CORP·Filed 1987·Granted Jun 14, 1988·27 cites·5 claims
- 1069US5171357AVacuum processing of particulate reactive metalJOHNSON AXEL METALS·Filed 1991·Granted Dec 15, 1992·15 cites·10 claims
- 1148US5084090AVacuum processing of reactive metalJOHNSON AXEL METALS·Filed 1990·Granted Jan 28, 1992·13 cites·10 claims
- 1227US4616363AElectron-beam furnace with magnetic stabilizationJOHNSON METALS CORP·Filed 1985·Granted Oct 7, 1986·2 cites·5 claims
Join the waitlist — get patent alerts
Get an alert when Howard R. Harker files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →