Institut Cerac S.A.
23Patents
0Active
23Granted
34Portfolio score
Filing activity: Apr 17, 1975 → Apr 15, 1987
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4446706A | Washing machine | Textiles; Paper | 80 | Expired |
| US4511312A | Method of driving the impeller of a liquid pump by means of a brushless a.c. motor; and a liquid pump for carrying out the method | Electricity | 22 | Expired |
| US4766963A | Hand-held hammer tool | Fixed Constructions | 22 | Expired |
| US4758132A | Rotary machine with motor embedded in the rotor | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US4665704A | Combustion engine system | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4099784A | Method and apparatus for breaking hard compact material such as rock | Fixed Constructions | 18 | Expired |
| US3988037A | Method of breaking a hard compact material, means for carrying out the method and application of the method | Fixed Constructions | 18 | Expired |
| US4503918A | Rock drilling apparatus | Fixed Constructions | 14 | Expired |
| US4114950A | Method and apparatus for breaking a hard compact material such as rock or concrete | Performing Operations; Transporting | 12 | Expired |
| US4660891A | High pressure water valve | Fixed Constructions | 10 | Expired |
| US4255374A | Method of compacting powder | Performing Operations; Transporting | 9 | Expired |
| US4264107A | Demolition tool for breaking solid materials | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4325895A | Method of producing large objects from rapidly quenched non-equilibrium powders | Performing Operations; Transporting | 8 | Expired |
| US4601351A | Electrically driven hammer machine | Performing Operations; Transporting | 7 | Expired |
| US4639645A | Drive system for A.C. motors | Electricity | 7 | Expired |
| US4492526A | Compressor drive system | Electricity | 7 | Expired |
| US4546282A | Magnetizable core for accommodating electrical conductors in an electrical machine, and a method of manufacturing such a core | Electricity | 7 | Expired |
| US4380421A | Die for compaction of powder | Performing Operations; Transporting | 5 | Expired |
| US4313759A | Wear resistant aluminium alloy | Performing Operations; Transporting | 4 | Expired |
| US4550282A | Method and device for controlling a brushless alternating current motor | Electricity | 4 | Expired |
| US4570213A | Static converter switch with fast recovery freewheel diode | Electricity | 3 | Expired |
| US4384834A | Device for compacting powder | Performing Operations; Transporting | 3 | Expired |
| US4853554A | Starting device | Mechanical Engineering; Lighting; Heating | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.