This inventor holds 9 USPTO granted patents. Top assignees: U.S. Philips Corporation, Bts Broadcast Television Systems Gmbh, North American Philips Corporation. Active years: 1979-1993.
Company Filing History:
7 out of 14,087 
1 out of 70 
1 out of 950 
Years Active: 1979-1993
Title: Innovations of Frederik J Van Roessel
Introduction
Frederik J Van Roessel is a notable inventor based in Upper Saddle River, NJ (US). He holds a total of 9 patents that showcase his contributions to technology, particularly in the field of video and camera systems. His work has significantly impacted the way we understand and utilize imaging technology.
Latest Patents
One of his latest patents is a system for focusing a television camera objective lens. This innovative system focuses a zoom lens objective of a color television camera by utilizing a luminance or green video signal derived from a portion of the picture. The signal is full-wave rectified and averaged, with the sharpest focus corresponding to the highest value of that average. The processed signal is converted to digital form and managed by a microcomputer for automatic focusing control.
Another significant patent is a pulse generator comprising at least two voltage comparison circuits. This pulse generator generates pulses at moments when a varying amplitude input voltage equals one of at least two threshold values produced by a voltage source. The design includes multiple voltage comparison circuits, each with specific inputs and outputs, allowing for precise control and functionality.
Career Highlights
Frederik has worked with prominent companies such as U.S. Philips Corporation and BTS Broadcast Television Systems GmbH. His experience in these organizations has allowed him to develop and refine his innovative ideas, contributing to advancements in broadcast technology.
Collaborations
Throughout his career, Frederik has collaborated with notable individuals, including Hendrik Breimer and Engbert Tienkamp. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.
Conclusion
Frederik J Van Roessel's contributions to the field of imaging technology through his patents and collaborations highlight his role as a significant inventor. His innovative systems continue to influence the industry and pave the way for future advancements.