Leo Bertram
29Patents
10h-index
12Co-inventors
72Inventor score
Filing activity: Jan 24, 1975 → Oct 7, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5022315A | Small electric household utensil for the production of foods by mixing by stirring | Human Necessities | 47 | Expired |
| US5738072A | Device for actuating a control member | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US5624100A | Device for actuating a control member | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4554471A | Electric motor having a U-shaped stator iron | Electricity | 21 | Expired |
| US4637283A | Corkscrew device | Performing Operations; Transporting | 21 | Expired |
| US4714851A | Single-phase synchronous motor comprising a two-pole permanent-magnet rotor | Electricity | 19 | Expired |
| US4577129A | Electric motor having two co-planar stator sections | Electricity | 18 | Expired |
| US4691132A | Synchronous motor with two-pole permanent-magnet soft-magnetic-core rotor | Electricity | 16 | Expired |
| US4803390A | Dual motor drive arrangement for a small domestic appliance | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4979297A | Rotary shaving head for an electric shaving apparatus | Performing Operations; Transporting | 12 | Expired |
| US5012147A | Domestic vibration apparatus with lever drive | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4008985A | Pumping device for fluids | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4827171A | Single-phase synchronous motor comprising a two-pole permanent-magnetic rotor and an eddy-current intermediate rotor | Electricity | 8 | Expired |
| US4759192A | Domestic appliance comprising a tool | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5118977A | Two-pole single-phase synchronous motor with permanent-magnet rotor, and starting device for use in the single-phase synchronous motor | Electricity | 8 | Expired |
| US5121020A | Rotor for an electric motor | Electricity | 8 | Expired |
| US4684840A | Synchronous motor having a permanent-magnet modular rotor | Electricity | 8 | Expired |
| US4503346A | Electric motor having a stator iron of a bent shape | Electricity | 7 | Expired |
| US5164654A | Solar energy operated automatic charge device for electric appliances | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4948999A | Self-starting two-pole single-phase synchronous motor | Electricity | 6 | Expired |
| US4812691A | Device for improving the stability of rotation of the rotor of a single-phase synchronous motor | Electricity | 5 | Expired |
| US4709752A | Cooling arrangement for heat generating electrical components | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4791327A | Drive mechanism for a domestic vibration apparatus | Emerging Cross-Sectional Technologies | 4 | Expired |
| US4604539A | Drive mechanism with a rotary drive motor | Electricity | 4 | Expired |
| US4628607A | Vibration dry shaving apparatus driven by a bipolar uniphase synchronous motor | Mechanical Engineering; Lighting; Heating | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.