MDU Resources Group, Inc. (MDU)
Patents
US patents through Dec 31, 2025 · PatentsView, from the USPTO’s Open Data Portal · read Oct 27, 20262 patents granted to the 2 names below, as the owner printed on each patent when it was granted. A later sale, a lapse or an expiry is not read, so this is what was granted to MDU Resources Group, Inc.’s names, not what it holds today.
0 published
1 published
| Granted | Patent | Title | Field | Owner as printed |
|---|---|---|---|---|
| Oct 11, 2016 | 9,464,438 | Method of repairing spacer fitting assemblies | Electrical machinery, apparatus, energy | MDU RESOURCES GROUP, INC. |
| Dec 9, 2014 | 8,905,364 | Spacer fitting repair plate | Electrical machinery, apparatus, energy | MDU RESOURCES GROUP, INC. |
| Published | Application | Title | Field | Owner as printed |
|---|---|---|---|---|
| Mar 26, 2015 | 2015/0082635 | METHOD OF REPAIRING SPACER FITTING ASSEMBLIES | Electrical machinery, apparatus, energy | MDU RESOURCES GROUP, INC. · patent 9,464,438 granted from it |
A patent is counted where the owner printed on it when it was granted carries the company’s own name, a former name, the name of a subsidiary its annual report lists, or its own name with a patent-holding phrase (Technology Licensing, Intellectual Property and the like), once the legal form, case and punctuation are set aside, and prints a country that name counts in. PatentsView’s data are published under the Creative Commons Attribution 4.0 licence. Source: PatentsView's granted patents and pre-grant publications, disambiguated, from the USPTO's Open Data Portal, through Dec 31, 2025, read Oct 27, 2026.