% Expired Patents = 16.7

Trademarks = 1

Forward Citations = 45

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3 inventors (with patents filed for the assignee):

Harold N Selim (3 out of 5 patents)

Neil Edwin Thomas (2 out of 2 patents)

John Norman Wells (1 out of 6 patents)

6 patents: Sort by Forward Citations

1. 6828874 - Signal combiner (2004-12-07),

2. 6400233 - Method and apparatus for compensating for distortion in IQ modulators (2002-06-04),

3. 6392397 - Method and apparatus for spectrum analysis by creating and manipulating candidate spectra (2002-05-21),

4. 4654886 - Local oscillator null circuit and method (1987-03-31),

5. 4641101 - Wideband, microwave regenerative divider with varactor tuning (1987-02-03),

6. 4636747 - System and method for wideband, continuous tuning of an oscillator (1987-01-13),

IFR Limited is a leading provider of integrated supply chain solutions for the oil and gas industry. With extensive experience in procurement, logistics, and warehouse management, we offer a comprehensive range of services to support our clients' operations. Our dedicated team is committed to delivering high-quality products and services on time and within budget, ensuring the success of every project we undertake.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

6 Patents

#8 in Stevenage

#2,676 in United Kingdom

Stevenage, United Kingdom

Ifr Limited

Forward Citations = 45

3 inventors:

Harold N Selim (3 out of 5 patents)

Neil Edwin Thomas (2 out of 2 patents)

John Norman Wells (1 out of 6 patents)

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