EPO Patents = 4

Forward Citations = 104

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5 inventors (with patents filed for the assignee):

Julius M Von Resch (3 out of 6 patents)

Walter Renz (2 out of 4 patents)

Julius Maus (2 out of 4 patents)

4. Udo Dieners (1 out of 3 patents)

5. Daniel Gründler (1 out of 2 patents)

6. Simon Golder (0 patent)

7. Robert Rossall (0 patent)

6 patents: Sort by Forward Citations

1. 6266981 - Lock, in particular mortise lock for an exterior door (2001-07-31),

2. D404142 - Combined window and window frame (1999-01-12),

3. 4562667 - Panel closure assembly for window, door or the like (1986-01-07),

4. 4557321 - Ventilator apparatus (1985-12-10),

5. 4434678 - Control mechanism for a window or door (1984-03-06),

6. 4428279 - Ventilation register (1984-01-31),

Company Overview

Gretsch-unitas is a leading manufacturer of high-quality door and window hardware solutions. With a rich history dating back over 100 years, the company offers innovative products and solutions for residential, commercial, and industrial applications. Their products are known for their durability, functionality, and aesthetic appeal. Gretsch-unitas is dedicated to providing customers with top-notch service and solutions that meet their specific needs and requirements.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

6 Patents

#11 in Ditzingen

#5,403 in Germany

Ditzingen, Germany

Gretsch-Unitas Gmbh

Forward Citations = 104

5 inventors:

Julius M Von Resch (3 out of 6 patents)

Walter Renz (2 out of 4 patents)

Julius Maus (2 out of 4 patents)

4. Udo Dieners (1 out of 3 patents)

5. Daniel Gründler (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gretsch-Unitas Gmbh. Retrieved from https://idiyas.com/company/gretsch-unitas

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]

4 patents (EPO):

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]