Schlumberger Industires, S.A.
266Patents
0Active
266Granted
43Portfolio score
Filing activity: Feb 27, 1978 → Aug 20, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5239575A | Telephone dial-inbound data acquisition system with demand reading capability | Emerging Cross-Sectional Technologies | 262 | Expired |
| US4910774A | Method and system for suthenticating electronic memory cards | Physics | 190 | Expired |
| US5027059A | Differential current shunt | Physics | 180 | Expired |
| US5032833A | Adaptive network routing for power line communications | Electricity | 152 | Expired |
| US5252967A | Reader/programmer for two and three wire utility data communications system | Emerging Cross-Sectional Technologies | 152 | Expired |
| US5473322A | Apparatus and method for sensing tampering with a utility meter | Physics | 143 | Expired |
| US5631554A | Electronic metering device including automatic service sensing | Emerging Cross-Sectional Technologies | 129 | Expired |
| US5509073A | Communications network | Electricity | 126 | Expired |
| US5355513A | Transponder with reply frequency derived from frequency of received interrogation signal | Physics | 119 | Expired |
| US5659303A | Method and apparatus for transmitting monitor data | Physics | 112 | Expired |
| US5451938A | RF meter reading system | Emerging Cross-Sectional Technologies | 110 | Expired |
| US5293115A | Method and system for sensing removal of a utility meter from its socket | Physics | 107 | Expired |
| US5243338A | Two and three wire utility data communications system | Emerging Cross-Sectional Technologies | 104 | Expired |
| US5155481A | Two and three wire utility data communications system | Emerging Cross-Sectional Technologies | 100 | Expired |
| US5422565A | Method and system for sensing removal of a utility meter from its socket | Physics | 96 | Expired |
| US5523559A | Method and system for sensing removal of a utility meter from its socket | Physics | 93 | Expired |
| US5416475A | Remote meter reading receptacle for pit lid mounting | Emerging Cross-Sectional Technologies | 93 | Expired |
| US5717718A | Multipoint to point radiocommunications network | Electricity | 93 | Expired |
| US5900606A | Method of writing information securely in a portable medium | Physics | 89 | Expired |
| US5197095A | System for remote transfer and collection of data, in particular from meters | Emerging Cross-Sectional Technologies | 84 | Expired |
| US4968970A | Method of and system for power line carrier communications | Emerging Cross-Sectional Technologies | 84 | Expired |
| US5953371A | Multipoint to point radiocommunications network | Electricity | 82 | Expired |
| US5060526A | Laminated semiconductor sensor with vibrating element | Physics | 81 | Expired |
| US5103079A | System for controlling the use of portable data media | Physics | 80 | Expired |
| US5679007A | Portable interface for an electronic smart card | Emerging Cross-Sectional Technologies | 78 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.