This inventor holds 7 USPTO granted patents and 5 published patent applications, plus 1 CIPO patent and 4 EPO patents. Top assignees: Stanley Black Decker, Inc., Builtrite, LLC, Epiroc Industrial Tools and Attachments LLC. Active years: 2012-2025.
Company Filing History:
4 out of 269 
2 out of 5 
1 out of 1 Years Active: 2012-2025
Title: The Innovative Contributions of Karl Johnson
Introduction
Karl Johnson is a notable inventor based in Duluth, MN, with a remarkable portfolio of seven patents. His work primarily focuses on enhancing the functionality and efficiency of various tools and machinery, showcasing his commitment to innovation in engineering.
Latest Patents
Among his latest inventions is the "Indexable Piercing Tip for Demolition Shears." This innovative design allows for a piercing tip that can be mounted to the jaws of heavy-duty demolition shears. It protects the surfaces of the shears during use and features a first operative position with a set of piercing and shearing edges. When these edges become dull, the tip can be rotated 180 degrees to present a new set of edges for continued use. Another significant patent is the "Variable Frequency Drive Electric Hydraulic Material Handler." This invention includes a motor, an interface device, and a controller that adjusts the frequency of the drive signal based on the activity of the interface device, optimizing the performance of the material handler.
Career Highlights
Throughout his career, Karl has worked with prominent companies such as Stanley Black & Decker, Inc. and Builtrite, LLC. His experience in these organizations has contributed to his development as an inventor and has allowed him to apply his innovative ideas in practical settings.
Collaborations
Karl has collaborated with talented individuals in the field, including Clayton Sederberg and Louis Maggio. These partnerships have likely fostered a creative environment that encourages the exchange of ideas and advancements in technology.
Conclusion
Karl Johnson's contributions to the field of invention are significant, with a focus on practical solutions that enhance existing tools and machinery. His innovative spirit and collaborative efforts continue to drive advancements in engineering and technology.