This inventor holds 5 USPTO granted patents, plus 1 CIPO patent. Top assignees: Incoe Corporation, Other. Active years: 1997-2000.
Company Filing History:
4 out of 52 
1 out of 834,307 Years Active: 1997-2000
Title: Innovations of John W. Tarr
Introduction
John W. Tarr is an accomplished inventor based in Goodrich, MI (US), known for his significant contributions to the field of engineering. With a total of five patents to his name, Tarr has developed innovative solutions that enhance the functionality and efficiency of various systems.
Latest Patents
One of Tarr's latest patents is a power factor correction system for a resistive load device. This system includes a sensing device that communicates with a power supply to measure line voltage and detect voltage fluctuations. A temperature controller receives power from the service lines and supplies an output voltage to resistive loads, such as heater members, which keep material in a molding device molten and within a specific temperature range. The sensing device prevents changes in voltage supplied to the resistive loads, ensuring stability.
Another notable patent is an injection molding system with sequential gate control. This invention involves an injection molding machine that molds plastic parts by injecting molten plastic through multiple valve gates into a mold cavity. A linear position sensor detects the position of a helical screw and controls the opening and closing of the gates based on this position. A computer monitors the position and activates the gates, while a pressure transducer provides an additional method for controlling the gates.
Career Highlights
Throughout his career, John W. Tarr has worked with reputable companies, including Incoe Corporation. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.
Collaborations
Tarr has collaborated with notable coworkers, including Dave Reitan and James A. Bott. Their teamwork has fostered an environment of creativity and innovation, leading to the development of advanced technologies.
Conclusion
John W. Tarr's contributions to the field of engineering through his patents and collaborations highlight his innovative spirit and dedication to advancing technology. His work continues to influence the industry and inspire future inventors.