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select DISTINCT count(*) from patent where intlcl like 'H04%' OR intlcl like '% H04%'

17 Patents found in Communications category

Displaying 1 to 17 of 17 patents

1     219655     India     A SYSTEM FOR CALIBRATING PLURALITY OF PRESSURE TRANSDUCERS
2     6868361     USA     Method of determining the volume scattering function of ocean waters in the backward direction using a satellite ocean color sensor
3     6208951     USA     Method and an apparatus for the identification and/or separation of complex composite signals into its deterministic and noisy components
4     184417     India     An improved process for the preparation of novel crystalline molecular sieve
5     179792     India     An electronic device for high speed peer to peer data communication.
6     168044     India     An improved electronic chip
7     154065     India     Method for the manufacture of improved liquid crystal digital display panels
8     146259     India     An intrinsically safe magneto-sound powered telephone
9     145046     India     A traversing mechanism for imparting uniform linear motion to crystals and photographic plates or films in X-ray topography camera or similar equipment.
10     143619     India     Improvements in or relating to the manufacture of lead zirconate titanate.
11     143297     India     Ultrasonic probe for the inspection of timber concert and like materials
12     143062     India     A device for picking up undulations on a moving disc record groove
13     142698     India     A device for picking up vibration such as voice singals directly from the throat
14     142130     India     Improvemnts in or relating to electret condenser microphone
15     141755     India     A hand operated machine for winding horizontal deflection coil for T.V
16     141303     India     Improvement in or relating to probe for ultrasonic therapy
17     140472     India     A current controlled inductive transducer and associated electronic circuit

Displaying 1 to 17 of 17 patents