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Hamburg, Germany

Andreas H Wichern

This inventor holds 11 USPTO granted patents. Top assignees: U.S. Philips Corporation, Koninklijke Philips Corporation N.v.. Active years: 1991-2004.

USPTO Granted Patents = 11

% Patents Active = 81.8

Average Co-Inventor Count = 1.4

ph-index = 5

Forward Citations = 98(Granted Patents)

Company Filing History:

8 out of 14,087

U.S. Philips Corporation

3 out of 21,862

Koninklijke Philips Corporation N.v.

Years Active: 1991-2004

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11 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6794941 - Gain-controlled amplifier with fixed minimum gain (2004-09-21),

2. 6762655 - Circuit arrangement (2004-07-13),

3. 6703886 - Circuit arrangement for rectifying a signal (2004-03-09),

4. 6198359 - Oscillator with cross-coupling by diodes (2001-03-06),

5. 6178320 - Radio receiver with a double-balanced mixer circuit having signal damping elements (2001-01-23),

6. 6075979 - Radio receivers (2000-06-13),

7. 5963082 - Circuit arrangement for producing a D.C. current (1999-10-05),

8. 5648741 - Circuit having overall transfer function providing temperature (1997-07-15),

9. 5619152 - Circuit arrangement for supplying an alternating signal current (1997-04-08),

10. 5235277 - Surface coil for magnetic resonance examinations (1993-08-10),

11. 4998066 - MR examination apparatus comprising a circuit for decoupling the two (1991-03-05),

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