Company Filing History:
5 out of 8,451 
1 out of 832,812 Years Active: 1989-2003
Title: Innovations by Jonathan Lee Engelstad
Introduction
Jonathan Lee Engelstad is an accomplished inventor based in Ankeny, Iowa. He holds a total of 6 patents that showcase his expertise in agricultural technology. His innovative designs focus on enhancing the efficiency and functionality of harvesting equipment.
Latest Patents
One of Engelstad's latest patents is the "Harvester row unit height control with electrohydraulic proportional valve structure." This invention features a row unit lift structure that incorporates electrohydraulic proportional valves connected to an electronic controller. The controller receives inputs from various sensors and switches, allowing for precise control of the row unit height during operation. Another significant patent is the "Height sensing system for a harvester head." This system utilizes rockshaft cylinders and hydraulic circuits to control the height of a harvester head, ensuring optimal performance in varying conditions.
Career Highlights
Throughout his career, Engelstad has worked with notable companies, including Deere & Company. His contributions to the field of agricultural machinery have significantly impacted the efficiency of harvesting processes.
Collaborations
Engelstad has collaborated with esteemed colleagues such as Robert Carl Blad and James William Riesterer. Their combined expertise has fostered advancements in agricultural technology.
Conclusion
Jonathan Lee Engelstad's innovative contributions to agricultural machinery demonstrate his commitment to enhancing efficiency in the industry. His patents reflect a deep understanding of technology and its application in real-world scenarios.