Duolingo, Inc. logo

Duolingo, Inc.

33 Marks
Corp.
First Filed:Jan 21, 2014Latest Filed:Apr 8, 2026Address:5900 Penn Ave., Pittsburgh, PA 15206, US

Portfolio Overview

Top Classes

Class 9
Electronics, Software & Scientific Equipment
7(21%)
Class 41
Education and Entertainment
6(18%)
Class 42
Software, IT Services & Scientific Research
5(15%)

TTAB Proceedings

Total Proceedings
5
As Plaintiff
4(80%)
As Defendant
1(20%)

Top Firms

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Trademark Activity Timeline(2014 – 2026)

Trademark Portfolio

33 results

(current & previous marks)

Refine by Mark/Description🔽
Filed
Registered
Last Activity
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751671
Filed:Apr 8, 2026
Classes:9
Goods & Services
Class 009: Mouse pads; Audio speakers; Portable power chargers
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751717
Filed:Apr 8, 2026
Classes:28
Goods & Services
Class 028: Board games; Beach balls; Toy pianos; Collectible toy figures; Toy masks; Chess sets; Chess pieces; Plastic character toys; Modeled plastic toy figurines
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751708
Filed:Apr 8, 2026
Classes:26
Goods & Services
Class 026: Hair ties; Hair clips; Hair bands
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751705
Filed:Apr 8, 2026
Classes:21
Goods & Services
Class 021: Cups; Water bottles sold empty
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751702
Filed:Apr 8, 2026
Classes:18
Goods & Services
Class 018: Travelling bags; Duffel bags; Tote bags; Purses; Backpacks; Umbrellas
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751692
Filed:Apr 8, 2026
Classes:16
Goods & Services
Class 016: Paper tissues; Pens; Paper notebooks; Pencil cases
DUOLINGO
DUOLINGO
Trademark
Word
PENDING
Owner:
Serial:99751688
Filed:Apr 8, 2026
Classes:14
Goods & Services
Class 014: Key chains
98134090
98134090
Service Mark
Design
REGISTERED
Owner:
Serial:98134090
Filed:Aug 15, 2023
Classes:41
Registration:7413828
Registered:Jun 11, 2024
Goods & Services
Education services, namely, providing language proficiency testing and assessment services
DUOLINGO ABC
DUOLINGO ABC
Service Mark
Word
REGISTERED
Owner:
Serial:97917223
Filed:May 2, 2023
Classes:41
Registration:7690147
Registered:Feb 11, 2025
Goods & Services
Educational services, namely, providing online interactive instruction in the field of literacy
DUOLINGO ABC
DUOLINGO ABC
Service Mark
Word
ABANDONED
Owner:
Serial:97917228
Filed:May 2, 2023
Classes:42
DUOLINGO ABC
DUOLINGO ABC
Trademark
Word
REGISTERED
Owner:
Serial:97917219
Filed:May 2, 2023
Classes:9
Registration:7690146
Registered:Feb 11, 2025
Goods & Services
Downloadable software for literacy development and education; downloadable mobile application software for literacy development and education
90181929
90181929
Service Mark
Design
REGISTERED
Owner:
Serial:90181929
Filed:Sep 15, 2020
Classes:41
Registration:7255486
Registered:Dec 26, 2023
Goods & Services
Language instruction; Providing a website featuring non-downloadable instructional videos and tutorials in the field of language proficiency; Education services, namely, providing language proficiency testing and assessment services
90181934
90181934
Service Mark
Design
REGISTERED
Owner:
Serial:90181934
Filed:Sep 15, 2020
Classes:42
Registration:7255487
Registered:Dec 26, 2023
Goods & Services
Software as a service (SAAS) services featuring software for learning foreign languages; Providing a website featuring non-downloadable software for learning foreign languages; Providing online non-downloadable computer software for use in connection with language proficiency testing and assessment
90181841
90181841
Trademark
Design
REGISTERED
Owner:
Serial:90181841
Filed:Sep 15, 2020
Classes:9
Registration:6278140
Registered:Feb 23, 2021
Goods & Services
Downloadable software in the nature of a mobile application which provides users with instruction in languages
90157399
90157399
Trademark
Design
REGISTERED
Owner:
Serial:90157399
Filed:Sep 3, 2020
Classes:16
Registration:7170122
Registered:Sep 19, 2023
Goods & Services
Stickers
90157395
90157395
Trademark
Design
ABANDONED
Owner:
Serial:90157395
Filed:Sep 3, 2020
Classes:9
90157413
90157413
Trademark
Design
ABANDONED
Owner:
Serial:90157413
Filed:Sep 3, 2020
Classes:18
90157420
90157420
Trademark
Design
REGISTERED
Owner:
Serial:90157420
Filed:Sep 3, 2020
Classes:28
Registration:7139567
Registered:Aug 15, 2023
Goods & Services
Stuffed and plush toys
DUOLINGO
DUOLINGO
Trademark
Word
REGISTERED
Owner:
Serial:90157386
Filed:Sep 3, 2020
Classes:28
Registration:6847405
Registered:Sep 13, 2022
Goods & Services
Stuffed and plush toys
DUOLINGO
DUOLINGO
Trademark
Word
ABANDONED
Owner:
Serial:90157382
Filed:Sep 3, 2020
Classes:18
DUOLINGO
DUOLINGO
Trademark
Word
REGISTERED
Owner:
Serial:90157377
Filed:Sep 3, 2020
Classes:16
Registration:7164605
Registered:Sep 12, 2023
Goods & Services
Stickers
DUOLINGO
DUOLINGO
Trademark
Word
ABANDONED
Owner:
Serial:90157365
Filed:Sep 3, 2020
Classes:9
DUOLINGO
DUOLINGO
Service Mark
Word
REGISTERED
Owner:
Serial:90052187
Filed:Jul 14, 2020
Classes:41, 42
Registration:6271788
Registered:Feb 16, 2021
Goods & Services
education services, namely, providing language proficiency testing and assessment services | providing online, non-downloadable computer software for enabling an interactive website for use in connection with language proficiency testing and assessment
88718547
88718547
Trademark
Design
REGISTERED
Owner:
Serial:88718547
Filed:Dec 6, 2019
Classes:25
Registration:7262389
Registered:Jan 2, 2024
Goods & Services
Clothing, namely, shirts, hoodies, sweatshirts, jackets, knit face masks being headwear; headwear
88718553
88718553
Service Mark
Design
REGISTERED
Owner:
Serial:88718553
Filed:Dec 6, 2019
Classes:42
Registration:6974908
Registered:Feb 7, 2023
Goods & Services
Software as a service (SAAS) services featuring software for learning foreign languages; Providing a website featuring non-downloadable software for learning foreign languages
88718551
88718551
Service Mark
Design
REGISTERED
Owner:
Serial:88718551
Filed:Dec 6, 2019
Classes:41
Registration:6660235
Registered:Mar 1, 2022
Goods & Services
Language instruction; Providing a website featuring non-downloadable instructional videos and tutorial videos in the field of language proficiency
88718544
88718544
Trademark
Design
REGISTERED
Owner:
Serial:88718544
Filed:Dec 6, 2019
Classes:14
Registration:7133513
Registered:Aug 8, 2023
Goods & Services
Lapel pins; Decorative pins, namely, ornamental lapel pins, ornamental novelty pins
DUOLINGO
DUOLINGO
Trademark
Word
REGISTERED
Owner:
Serial:88718536
Filed:Dec 6, 2019
Classes:25
Registration:7262388
Registered:Jan 2, 2024
Goods & Services
Clothing, namely, shirts, hoodies, sweatshirts, jackets, knit face masks being headwear; headwear
DUOLINGO
DUOLINGO
Service Mark
Word
REGISTERED
Owner:
Serial:88718539
Filed:Dec 6, 2019
Classes:42
Registration:6160063
Registered:Sep 22, 2020
Goods & Services
Software as a service (SAAS) services featuring software for learning foreign languages; Providing a website featuring non-downloadable software for learning foreign languages
DUOLINGO
DUOLINGO
Trademark
Word
REGISTERED
Owner:
Serial:88718531
Filed:Dec 6, 2019
Classes:14
Registration:7133512
Registered:Aug 8, 2023
Goods & Services
Lapel pins; Decorative pins, namely, ornamental lapel pins, ornamental novelty pins
88703483
88703483
Trademark
Design
REGISTERED
Owner:
Serial:88703483
Filed:Nov 22, 2019
Classes:9
Registration:6084930
Registered:Jun 23, 2020
Goods & Services
Downloadable software in the nature of a mobile application which provides users with instruction in languages
TINYCARDS
TINYCARDS
Trademark
Word
CANCELLED
Owner:
Serial:87028145
Filed:May 6, 2016
Classes:9
Registration:5201551
Registered:May 9, 2017
DUOLINGO
DUOLINGO
Trademark
Word
REGISTERED
Owner:
Serial:86171435
Filed:Jan 21, 2014
Classes:41
Registration:4588574
Registered:Aug 19, 2014
Goods & Services
downloadable software for mobile phones for learning foreign languages | language instruction; providing online classes for learning foreign languages; online journals, namely, blogs in the field of language instruction; translation services for others