Ralf Kelz — 6 Patents at 3M | Patent Leaderboard

Ralf Kelz has been granted 6 US patents while listed as an inventor at 3M. The first was granted in 2013 and the most recent in April 2025. Ralf Kelz ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Ralf Kelz in Germering, DE.

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12268567	Apparatus, system, method of post-curing an article, and post-cured article	Rudolf Schmid, Christian A. Richter, Anja Friedrich, James D. Hansen, Saswata Chakraborty +2 more	2025-04-08
11931219	Method of charging a battery and a system having a dental light irradiation device and a battery charging device	—	2024-03-19	$27,219,000
10231810	Dental irradiation device and system	Jens Gramann, Stefan K. Welke, Thomas Mueller, Korbinian Schepke-Gerlach, Karin Watzek +2 more	2019-03-19	$39,047,000
9775691	System and device for dispensing a dental material and a cartridge for use with the system or device	Jens Gramann, Korbinian Schepke-Gerlach, Manfred Harre, Emir Jelovac, Özcan Dönmez +1 more	2017-10-03	$23,759,000
8814738	Device for dispensing a dental composition	Jens Gramann, Manfred Harre, Christian A. Richter, Karin Watzek, Oezcan Doenmez	2014-08-26	$16,300,000
8613376	Device for dispensing a dental material	Jens Gramann	2013-12-24	$35,818,000

Ralf Kelz — 6 Patents

Issued Patents All Time

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