Patents
US 11631338 B2: Deep knowledge tracing with transformers
- Granted
- 2023-04-18
- Filed
- 2020-06-11 application 16899433
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Digital learning or tutoring systems as described herein embed, by a trained machine learning knowledge tracing engine, an array for learner interactions X into a static representation ej corresponding to a prior learner interaction xj and determine a contextualized interaction representation hj based on this. Digital tutoring systems described herein calculate, by a masked attention layer of the trained machine learning knowledge tracing engine, an attention weight Aij based on a time gap between two learner interactions with the system, and can calculate a contextualized interaction representation hj, wherein the contextualized interaction representation hj is proportional to the attention weight Aij. The systems can provide for display at the GUI a second question item based on the contextualized interaction representation hj, the second question item corresponding to a recommended learner recommendation.
Source: PVGPATDIS, file of 2026-04-10 (ipg230418.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ACT CORPORATION 25 patents | Foreign company or organization | Iowa City, IA | ACT, INC. Federal lobbying client FUZZY medium confidence: same name (legal endings aside) and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Shi Pu | Iowa City, IA | 11 | PVGPATDIS, file of 2026-04-10 | |
| Michael Yudelson | Iowa City, IA | 2 | PVGPATDIS, file of 2026-04-10 | |
| Lu Ou | Iowa City, IA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Yuchi Huang | Iowa City, IA | 4 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G09B | Educational or demonstration appliances; appliances for teaching, or communicating with, the blind, deaf or mute; models; planetaria; globes; maps; diagrams | G09B7/02 | PVGPATDIS, file of 2026-04-10 |
| G06F | Electric digital data processing | G06F16/3329 | PVGPATDIS, file of 2026-04-10 |
| G06N | Computing arrangements based on specific computational models | G06N3/044 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2024-06-14 | Security interest Security interest Security interest | ACT EDUCATION CORP. signed 2024-06-13 | TRUIST BANK ATLANTA, GA | 67732/278 | ECORSEXC, file of 2026-09-25 |
| 2024-06-13 | Security interest Security interest Security interest | ACT EDUCATION CORP. signed 2024-05-01 | TRUIST BANK ATLANTA, GA | 67713/790 | ECORSEXC, file of 2026-09-25 |
| 2024-06-11 | Name change Change of name | IMPACT ASSET CORP. signed 2024-05-30 | ACT EDUCATION CORP. IOWA CITY, IA | 67683/808 | ECORSEXC, file of 2026-09-25 |
| 2024-05-08 | Assignment Assignment of assignor's interest | ACT, INC. signed 2024-05-01 | IMPACT ASSET CORP. IOWA CITY, IA | 67352/636 | ECORSEXC, file of 2026-09-25 |
| 2020-06-18 | Assignment Assignment of assignor's interest | OH, LU signed 2020-06-15 HUANG, YUCHI signed 2020-06-16 PU, SHI signed 2020-06-16 YUDELSON, MICHAEL signed 2020-06-16 | ACT, INC. IOWA CITY, IA | 52979/840 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.