SIRS KNOWLEDGE SOURCE holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 42 (Science & Technology) with 1 filings. The WikiTrademarks Expansion Score is 0/100, low — the brand is focused on defending its existing categories rather than expanding.
USPTO data refreshed June 14, 2026
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Sign in to claimHow is SIRS KNOWLEDGE SOURCE filing trademarks, and where is the portfolio expanding?
Filing Velocity (24 Months)
Nice Class Distribution
Activity Timeline
No activity recorded yet.
Ownership & Assignment History
3 records| Date | From | To |
|---|---|---|
| Dec 17, 2015 |
PROQUEST LP
PROQUEST LLC
DIALOG LLC
EBRARY
EX LIBRIS (USA) INC.
|
BANK OF AMERICA, N.A. AS COLLATERAL AGEN...
CHARLOTTE, NORTH CAROLINA
|
| Oct 30, 2014 |
MORGAN STANLEY SENIOR FUNDING, INC., AS...
|
PROQUEST LLC
BETHESDA, MARYLAND
EBRARY
MOUNTAIN VIEW, CALIFORNIA
DIALOG LLC
ANN ARBOR, MICHIGAN
CAMBRIDGE SCIENTIFIC ABSTRACTS, LIMITED...
BETHESDA, MARYLAND
PROQUEST INFORMATION AND LEARNING LLC
ANN ARBOR, MICHIGAN
|
| Oct 24, 2014 |
PROQUEST LLC
EBRARY
PROQUEST LP
DIALOG LLC
|
BANK OF AMERICA, N.A., AS COLLATERAL AGE...
CHARLOTTE, NORTH CAROLINA
|
Recent Filings
| Serial No. | Mark | Filing Date | Status | Classes | Owner |
|---|---|---|---|---|---|
| 76259654 | SIRS KNOWLEDGE SOURCE | May 21, 2001 | Abandoned | 042 Science & Technology | PROQUEST LLC |
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FAQ: SIRS KNOWLEDGE SOURCE trademark portfolio
What trademarks does SIRS KNOWLEDGE SOURCE hold?
SIRS KNOWLEDGE SOURCE holds 1 USPTO trademark filings across 0 NICE classes. The largest concentration is in Class 42 (Science & Technology). The most recent filings are registered to PROQUEST LLC.
How many trademarks does SIRS KNOWLEDGE SOURCE have at the USPTO?
WikiTrademarks tracks 1 USPTO trademark filings attributed to SIRS KNOWLEDGE SOURCE. The brand has been actively filing since May 2001. The count updates daily as new filings are indexed from the USPTO bulk data feed.
In which NICE classes does SIRS KNOWLEDGE SOURCE file most often?
SIRS KNOWLEDGE SOURCE's most active class is NICE Class 42 (Science & Technology), with 1 filings. The full distribution across all 0 classes is shown in the Nice Class Distribution panel on this page.
Who owns the SIRS KNOWLEDGE SOURCE trademark?
The most recent filings under the SIRS KNOWLEDGE SOURCE mark are registered to PROQUEST LLC. Trademark ownership can shift through assignments — see the Ownership & Assignment History section on this page for the full chain of title.
Is SIRS KNOWLEDGE SOURCE expanding into new categories?
The current WikiTrademarks Expansion Score for SIRS KNOWLEDGE SOURCE is 0 out of 100, which is low — the brand is focused on defending its existing categories rather than expanding. The score combines NICE class breadth, filing velocity, and the rate of cross-class movement from the brand's filing history.
How can I track new SIRS KNOWLEDGE SOURCE trademark filings?
Click the Watch Brand button at the top of this page to add SIRS KNOWLEDGE SOURCE to your Watchlist. New filings show up on your WikiTrademarks dashboard within 24 to 48 hours of being public, alongside any class expansions, status changes, or assignment events.
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