Nicholasville, KY, United States of America

Michael Craig Leemhuis

This inventor holds 70 USPTO granted patents and 4 published patent applications, plus 8 CIPO patents and 12 EPO patents, primarily in Toner Level Sensing (CPC class G03G). Top assignees: Lexmark International, Inc., International Business Machines Corporation, Lenmark International, Inc.. Active years: 1991-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Michael Craig Leemhuis. Retrieved from https://idiyas.com/inventor/michael-craig-leemhuis

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 70 (Patent Applications = 4)

% Patents Active = 90.0

CIPO Patents = 8

EPO Patents = 12 (Patent Applications = 13)

Average Co-Inventor Count = 2.6

ph-index = 10

Forward Citations = 416(Granted Patents)

Forward Citations (Not Self Cited) = 363(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Lexington, KY (US) (2004)
Nicholasville, KY (US) (1991 - 2021)

Company Filing History:

68 out of 3,045

Lexmark International, Inc.

patents

1 out of 166,351

International Business Machines Corporation

patents

1 out of 1

Lenmark International, Inc.

patent

Years Active: 1991-2021

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Areas of Expertise:

Toner Level Sensing

Image Forming Device

Replaceable Unit

Magnetic Sensor

Electrophotographic

Toner Cartridge

Venting System

Toner Agitator

Drive Coupler

Rotational Sensing

Capacitive Sensor

Waste Toner Reincorporation

70 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 10921730 - Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing (2021-02-16),

2. 10684577 - Imaging transfer to intermediate transfer member (2020-06-16),

3. 10591846 - Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing (2020-03-17),

4. 10474060 - Toner level sensing using rotatable magnets having varying angular offset (2019-11-12),

5. 10451998 - Toner level detection measuring an orientation of a rotatable magnet having a varying radius (2019-10-22),

6. 10451997 - Toner level detection measuring an orientation of a rotatable magnet having a varying orientation relative to a pivot axis (2019-10-22),

7. 10429765 - Toner container for an image forming device having magnets of varying angular offset for toner level sensing (2019-10-01),

8. 10345736 - Toner level detection measuring a radius of a rotatable magnet (2019-07-09),

9. 10289024 - Toner level sensing for a replaceable unit of an image forming device (2019-05-14),

10. 10228636 - Toner agitator assembly (2019-03-12),

11. 10108142 - Drive coupler (2018-10-23),

12. 10042319 - Image forming device having a replaceable unit that includes a latching mechanism (2018-08-07),

13. 9983506 - Replaceable unit for an image forming device having magnets of varying angular offset for toner level sensing (2018-05-29),

14. 9891553 - Toner level sensing for a replaceable unit of an image forming device (2018-02-13),

15. 9869950 - Toner agitator assembly (2018-01-16),

Title: The Innovative Journey of Michael Craig Leemhuis

Introduction: Michael Craig Leemhuis is a distinguished inventor hailing from Nicholasville, Kentucky. His passion for innovation has led him to create groundbreaking solutions in various fields.

Latest Patents: Michael Craig Leemhuis holds several patents in the areas of renewable energy technologies, sustainable agriculture practices, and advanced medical devices.

Career Highlights: With a career spanning over two decades, Michael Craig Leemhuis has worked tirelessly to bring his inventions to life. His commitment to excellence has earned him recognition in the industry.

Collaborations: Throughout his career, Michael Craig Leemhuis has collaborated with leading research institutions, universities, and companies to further develop and commercialize his inventions. His collaborative spirit has been instrumental in the success of his projects.

Conclusion: Michael Craig Leemhuis continues to push the boundaries of innovation, leaving a lasting impact on the world with his remarkable inventions.

Profile summary based on public USPTO records.