DIFFERENCE ENGINE
Live / Registered — Registered and renewed (as of 07 Mar 2026)
What this means for you
Registered since 24 Nov 2015. The owner can stop confusingly similar uses in the classes it covers; it stays on the register as long as the owner keeps up the maintenance filings (next due by 24 Nov 2025).
Record
- Serial number
- 86399519
- Registration number
- 4857726
- Mark type
- Design + words
- Filed
- 18 Sept 2014
- Published for opposition
- 08 Sept 2015
- Registered
- 24 Nov 2015
- Next maintenance due
- 24 Nov 2025
- Attorney of record
- Thomas W. Brooke
Goods and services
- Class 042 — Scientific and technological services: Software development services in the field of education; hosting the software, websites and other computer applications of others on a virtual private server
Owner
- LO VENTURES LLC, WASHINGTON, DC, US
- CENGAGE LEARNING, INC., BOSTON, MA, US
- LEARNING OBJECTS, LLC, WASHINGTON, DC, US
- Learning Objects, Inc., Washington, DC, US
- Learning Objects, Inc., Washington, DC, US
- Learning Objects, Inc., Washington, DC, US
Prior registrations
Prosecution history
- 07 Mar 2026 — NOTICE OF ACCEPTANCE OF SEC. 8 & 9 - E-MAILED
- 07 Mar 2026 — REGISTERED AND RENEWED (FIRST RENEWAL - 10 YRS)
- 07 Mar 2026 — REGISTERED - SEC. 8 (10-YR) ACCEPTED/SEC. 9 GRANTED
- 06 Mar 2026 — CASE ASSIGNED TO POST REGISTRATION PARALEGAL
- 11 Dec 2025 — TEAS SECTION 8 & 9 RECEIVED
- 24 Nov 2024 — COURTESY REMINDER - SEC. 8 (10-YR)/SEC. 9 E-MAILED
- 20 Sept 2021 — NOTICE OF ACCEPTANCE OF SEC. 8 & 15 - E-MAILED
- 20 Sept 2021 — REGISTERED - SEC. 8 (6-YR) ACCEPTED & SEC. 15 ACK.
- 20 Sept 2021 — CASE ASSIGNED TO POST REGISTRATION PARALEGAL
- 07 Jun 2021 — TEAS SECTION 8 & 15 RECEIVED
- 24 Nov 2020 — COURTESY REMINDER - SEC. 8 (6-YR) E-MAILED
- 22 Jul 2020 — AUTOMATIC UPDATE OF ASSIGNMENT OF OWNERSHIP
- 04 Mar 2020 — AUTOMATIC UPDATE OF ASSIGNMENT OF OWNERSHIP
- 29 Jan 2020 — AUTOMATIC UPDATE OF ASSIGNMENT OF OWNERSHIP
- 24 Nov 2015 — REGISTERED-PRINCIPAL REGISTER