This inventor holds 5 USPTO granted patents, plus 1 CIPO patent and 1 EPO patent. Top assignees: Cominvest Research Ab, Abb Technology Ag, Sheild Research in Sweden. Active years: 1992-2015.
Company Filing History:
2 out of 2 
1 out of 862 
1 out of 1 Years Active: 1992-2015
Title: Per Lindholm: Innovator in Electrical Engineering
Introduction
Per Lindholm is a notable inventor based in Stockholm, Sweden. He has made significant contributions to the field of electrical engineering, holding a total of 5 patents. His work focuses on innovative solutions that enhance the functionality and safety of electrical devices.
Latest Patents
One of Lindholm's latest patents is for a switch having two sets of contact elements. This exemplary medium or high voltage switch features a first and a second set of contact elements, each consisting of an insulating carrier that carries conducting elements. In the closed state of the switch, the conducting elements align to form one or more current paths between the terminals of the switch along an axial direction. To open the switch, the contact elements are mutually displaced by means of one or two drives along a direction that is perpendicular to the axial direction. This switching arrangement is housed in a fluid-tight casing, either in a gas of elevated pressure or in a liquid, providing high voltage withstand capability and fast switching times.
Another significant patent by Lindholm is a method and apparatus for preventing external detection of signals. This invention addresses the issue of external detection of signal information in video signals emitted from video signal circuits in display units. The method involves emitting a phantom signal in the form of a pseudo-random bit signal sequence alongside the video signals. A generator for this phantom signal is connected to an external power supply line, allowing for the output of the phantom signal. The control unit varies the bit frequencies of the pseudo-random bit signal sequences, enhancing the security of the video signals.
Career Highlights
Throughout his career, Per Lindholm has worked with several companies, including Cominvest Research AB and Shield Research in Sweden. His experience in these organizations has contributed to his expertise in electrical engineering and innovation.
Collaborations
Lindholm has collaborated with notable professionals in his field, including Lars Liljestrand and Lars E Jonsson. These collaborations have likely enriched his work and led to further advancements in his inventions.
Conclusion
Per Lindholm is a distinguished inventor whose contributions to electrical engineering have led to innovative patents that enhance the functionality and security of electrical devices. His work continues to influence the industry and inspire future innovations.