At the time of the Great Exhibition in 1851, England was regarded as the "workshop of the world" and the leading country for engineering technology. Because of this, Professor Jensen of Copenhagen University decided to send his son Peter to England to train as an engineer. Peter became an engineer and was an early member of the Institution of Mechanical Engineers.
He set up his own engineering consultancy firm in the 1860s and on the 26th January 1867 he filed a patent application for a gearing system for a Danish company. In the patent specification he described himself as a consulting engineer and patent agent.

Although his firm was in existence before that date we regard 26th January 1867 as the start of Jensen & Son, Patent Attorneys. From this first patent, which describes a gearing system for a horse-powered wheel, we have progressed to patenting the latest technology, such as satellite communication systems and vehicles having 600 HP engines, inventions beyond the wildest dreams of our founder.

Continuity is a characteristic of the firm which is quite unique in having had only five Senior Partners in its more than 130 years history.

We have associates in nearly every country in the world and some of our business relationships with these associates and clients have existed for more than 100 years.