Location History:
- Eden Prairie, MN (US) (1993)
- Orlando Park, IL (US) (2018)
- Orland Park, IL (US) (2018 - 2019)
- Chicago, IL (US) (2004 - 2024)
Company Filing History:
5 out of 5 
2 out of 4 
2 out of 4 
Years Active: 1993-2025
Title: Exploring the Innovative Mind of Mark Hartelius
Introduction:
Mark Hartelius, a prolific inventor based in Chicago, IL, has made a mark in the world of patents with an impressive portfolio of 22 patents. His creations range from play balls with unique foam filling to innovative pet cat houses.
Latest Patents:
Among his latest patents is the "Play ball with foam filling," a revolutionary design where the rubber shell of a play ball is filled with resilient foam. This construction allows for enhanced bounce life, thanks to the intimate attachment of the foam to the shell, providing resiliency through both tension and compression. Another notable creation is the seamed dog chew toy, which boasts similar construction to improve durability against the chewing force of dogs.
Career Highlights:
Throughout his career, Mark Hartelius has been associated with notable companies such as Hartdesign Ltd. His dedication to innovation and creativity has led to the development of groundbreaking products that have garnered recognition in the patent world.
Collaborations:
Mark Hartelius has had the privilege of collaborating with individuals such as Christopher P. Dooley and Loren T. Taylor. These collaborations have enriched his inventions with diverse perspectives and expertise, leading to the success of his patented creations.
Conclusion:
Mark Hartelius stands as a shining example of an inventive mind, constantly pushing the boundaries of traditional designs to create innovative solutions. With a keen eye for detail and a passion for creating products that make a difference, he continues to inspire the world of inventions and patents with his remarkable contributions.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.