Powerstax plc (previously Advanced Power Conversion plc) – a designer and manufacturer of power solutions with particular emphasis on its world-leading dc-dc converters – see www.powerstaxplc.com

Voxab Limited – develops and manufactures VoIP telephones, wireless security devices and short range radio link systems. Voxab is incorporated in the UK and Hong Kong – see www.voxab.com

Among the companies IPR and its founders have successfully developed and sold are:

C-Dilla Limited – a world leading designer and supplier of encryption and compression software – sold to Macrovision, Inc in the US in 1999 – see www.macrovision.com

Technotrend Limited – founded by IPR’s founders in 1976. Technotrend design and manufacture a range of Anti-Static, Security and Safety products for domestic, commercial and industrial use – see www.technotrend.co.uk

Technophone Limited – founded by IPR’s founders in 1984. Designer and manufacturer of the world’s first truly pocket-sized cellular telephone in 1985. In 1991, when the company was sold to Nokia in Finland, it was the fourth largest manufacturer of mobile phones in the world – see www.nokia.com

Celluloid Limited – a leading manufacturer of plastic mouldings for the computer, telecoms and car industry. Sold in 1986 to Forsheda AB of Sweden (which later became part of Smiths Group plc) – see www.smiths-group.com