% Expired Patents = 33.3

Trademarks = 1

Forward Citations = 35

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4 inventors (with patents filed for the assignee):

Dirk Niedermann (3 out of 16 patents)

Kelvin Li (1 out of 2 patents)

Chen Hui (1 out of 1 patent)

4. Kin Wan Li (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 9702575 - Appliance requiring intake air during operation (2017-07-11),

2. D685896 - Humidifier (2013-07-09),

3. 7441756 - Humidifier with adornment to simulate the appearance of a three dimensional object (2008-10-28),

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

3 Patents

#35 in Itasca, IL

#3,452 in Illinois

#73,860 in US

Itasca, IL, United States of America

Wachsmuth and Krogmann, Inc.

Forward Citations = 35

4 inventors:

Dirk Niedermann (3 out of 16 patents)

Kelvin Li (1 out of 2 patents)

Chen Hui (1 out of 1 patent)

4. Kin Wan Li (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Wachsmuth and Krogmann, Inc.. Retrieved from https://idiyas.com/company/wachsmuth-and-krogmann

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

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]