Single Cell Split-Pool Barcoding Patents: Who Leads and Where Filings Are Slowing

The assignee ranking for this dataset covers 36 companies, and the leader holds 22 of the tracked patent families, well ahead of the fifth-ranked filer at 7 and the tenth-ranked filer at 4. That gap means claim density in the core enzymatic tagging methods is concentrated in one filer's portfolio rather than distributed across the field. The remainder of the ranking includes a long tail of research institutions and diagnostics companies with single-digit filing counts, so licensing or freedom-to-operate checks should prioritise the leader first and then work down the ranked list.

This dataset is scoped specifically to split-pool combinatorial barcoding, which tags cells or nuclei through sequential rounds of pooling and splitting rather than isolating each cell in a droplet or well. That distinction matters for prior art searches because droplet-based methods sit largely outside this corpus and carry a separate body of claims. Practitioners should treat the IPC composition here — heavily weighted toward C12Q enzymatic methods and C40B combinatorial libraries — as characteristic of the split-pool approach specifically, not of single-cell barcoding generally.

Filing activity peaked at 16 in 2018 and, using the most recent complete comparison available (2021 at 6 filings versus 2024 at 5 filings), moved -17% over that three-year span. That is a measured decline, not a collapse, and it should not be read as the field slowing further based on 2025 or 2026 counts, since publication typically lags filing by around 18 months and those years are still filling in. A clearer read on the current trajectory will only be possible once another one to two years of filings have published.

C12Q (enzymatic and DNA measurement methods) is the class to check first, appearing in 78.9% of the 76 records in scope, followed by C12N genetic engineering constructs at 35.5% and G01N material analysis methods at 23.7%. Bioinformatics claims under G16B and combinatorial library claims under C40B are smaller but still material at 13.2% and 10.5% respectively. Because a single patent record can carry several IPC classes, a thorough search needs to clear all of these rather than treating them as separate, non-overlapping search buckets.

Among the receiving offices captured in this dataset, the United States leads with 30 filings, followed by the WIPO PCT route at 18 and the European Patent Office at 16, with smaller counts in Austria, Germany and Australia. That pattern points to the US and the PCT system as the primary venues for establishing priority in this space, with Europe as a secondary but still active jurisdiction. Anyone clearing a specific national market should still confirm coverage locally, since PCT filings can later enter national phase in jurisdictions not separately broken out here.