How Apps Automatically Link Multiple User Accounts
A method for logging into multiple separate user accounts with a single set of credentials and managing them through one unified interface.
Original patent title: “Account linking”
A method for logging into multiple separate user accounts with a single set of credentials and managing them through one unified interface. Granted to Facebook Inc in 2014 with 29 claims and 26 forward citations.
Key facts
Coverage
What does this patent actually cover?
The patent describes a system where a user provides login information for one primary account, and the system automatically authenticates a second, different account without requiring a second password. Once both are active, the system presents a single graphical user interface that displays buddy lists or contact lists from both accounts simultaneously. The user can then select which account to send a message from, and the recipient sees the message as originating from that specific account. For example, a user could sign into a work account and have their personal account automatically connect, allowing them to toggle between messaging coworkers and friends within the same window.
The gap
What does this patent NOT cover?
- Does not cover systems that require separate passwords for each account.
- Does not cover account linking that occurs without a shared graphical user interface.
- Does not cover authentication methods that rely on third-party tokens or OAuth protocols not described in the claimsclaimsThe numbered statements at the end of a patent that legally define what the inventor owns.Read more →.
- Does not cover single sign-on (SSO) systems that do not specifically manage multiple buddy lists or contact lists within a single interface.
These exclusions are unique to PatentBrief — derived from the actual claim language, not patent-office boilerplate.
What made this novel
The innovation lies in using the primary login as a master key to trigger secondary authentications, combined with a UI that dynamically merges distinct contact lists into a single view without losing the identity context of each contact.
Schematic visualization of the patent's claim structure. Hand-drawn diagrams in progress for each landmark patent.
Where you've seen this
Real-world examples
Modern multi-account support in messaging apps
Unified inbox features in email clients
Switching between personal and professional profiles in social media apps
Why it matters
The bigger picture
This patent reflects the early 2000s transition from siloed messaging services to integrated social platforms. By allowing users to manage multiple identities (like work versus personal) in one place, it paved the way for the unified account management systems now standard in modern social media and messaging apps.
Filed
November 18, 2003
Granted
April 15, 2014
Market context
Who's building on this
Companies in this space
Meta (formerly Facebook) owns this patent, which originated from their acquisition of AOL/AIM-related assets. Major tech companies like Google and Microsoft have built extensive ecosystems around similar unified identity and account-linking frameworks.
Market impact
This patent helped formalize the user experience for managing multiple digital identities. It influenced how messaging platforms consolidated their user bases and simplified the friction of switching between accounts, a core requirement for the growth of modern multi-identity social networks.
Claim 1 — Plain English
What this patent covers
The patent describes a system where a user provides login information for one primary account, and the system automatically authenticates a second, different account without requiring a second password. Once both are active, the system presents a single graphical user interface that displays buddy lists or contact lists from both accounts simultaneously. The user can then select which account to send a message from, and the recipient sees the message as originating from that specific account. For example, a user could sign into a work account and have their personal account automatically connect, allowing them to toggle between messaging coworkers and friends within the same window.
The clever bit
The innovation lies in using the primary login as a master key to trigger secondary authentications, combined with a UI that dynamically merges distinct contact lists into a single view without losing the identity context of each contact.
What it does not cover
- Does not cover systems that require separate passwords for each account.
- Does not cover account linking that occurs without a shared graphical user interface.
- Does not cover authentication methods that rely on third-party tokens or OAuth protocols not described in the claims.
- Does not cover single sign-on (SSO) systems that do not specifically manage multiple buddy lists or contact lists within a single interface.
Patent timeline
Application submitted to the patent office
Application published, typically 18 months after filing
Patent officially issued
PatentBrief Score
Impact Score
Strong
Citation count
29/40
Moderately cited
Claim breadth
19/20
Very broad protection
Recency
5/20
Granted 10–20 years ago
Assignee scale
20/20
Major company or institution
PatentBrief Impact Score — based on citation count, claim breadth, recency, and assignee scale. Not a legal assessment.
Heuristic Value Estimate
What this patent might be worth
$31K – $98K
Midpoint $61K · expired or expiring · industry ×1.4
Heuristic only — blends forward/backward citation counts, claim scope, time remaining, litigation history, and CPC-derived industry baseline. Real valuations need a professional appraisal.
The original legal language
Original claims
29 claims as filed with the patent office.
Concepts involved
Citations
Patent lineage
Cite this patent
Wu, P., Chung, C. C., McNally, B., Richards, R. W., Enloe, M. R., Cypes, G., Keister, A., Schlegel, H. A., Odell, J. A., McCormick, D., Wick, A. L., Inch, A., Appelman, B., Cox, D., & Zhang, X. (2014). How Apps Automatically Link Multiple User Accounts (U.S. Patent No. 8,701,014). U.S. Patent and Trademark Office. https://patentbrief.org/patent/us/8701014/office-365-co-authoring
Auto-generated from the patent record. Double-check author order and the issue date against the official USPTO document before submitting.
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Common Questions
Frequently Asked Questions
What does How Apps Automatically Link Multiple User Accounts cover?
A method for logging into multiple separate user accounts with a single set of credentials and managing them through one unified interface.
Who owns patent US 8701014?
Facebook Inc owns this patent, granted in 2014.
When does this patent expire?
This patent is expected to expire on April 15, 2034, when the invention enters the public domain.
What is patent US 8701014 cited by?
This patent has been cited by 26 later patents that build on its ideas.
What problem does this patent solve?
This patent reflects the early 2000s transition from siloed messaging services to integrated social platforms. By allowing users to manage multiple identities (like work versus personal) in one place, it paved the way for the unified account management systems now standard in modern social media and messaging apps.
What does this patent NOT cover?
Does not cover systems that require separate passwords for each account.
Same assignee
More from Facebook Inc
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