Inventor · disambiguated record
Ewald Hald
Also filed as: HALD EWALD
4 granted patents·265 citations·filing 1986–1999
82Inventor score
Files withFEIN C & E4
Top patents by PatentIndex Score
4 records- 0196US4655103AClutch for power screwdriversFEIN C & E·Filed 1986·Granted Apr 7, 1987·96 cites·5 claims
- 0295US4779687AElectric tool with source of power independent of the lineFEIN C & E·Filed 1987·Granted Oct 25, 1988·114 cites·11 claims
- 0375US6173792B1Power-driven screwdriver with torque-dependent release clutchFEIN C & E·Filed 1999·Granted Jan 16, 2001·36 cites·12 claims
- 0461US4923047AMachine with variable torque settingFEIN C & E·Filed 1988·Granted May 8, 1990·19 cites·23 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →