Fuel Cell Stack Hydrogen Storage Keyword Candidate Study

Filter-difference study

Against the 64-record Hydrogen Energy Keyword Candidate Study, this 49-record cohort shares 46 records. Only 3 occur here and 18 only in the reference; the union contains 67. These are filter-membership differences, not company entries or exits.

An ID-deduplicated archive snapshot, not the whole market, current recognition or operating results.

The largest recorded sub-industry participation gap is for Hydrogen fuel-cell systems: 11/49 here versus 11/64 in the reference, an absolute difference of 5.3 percentage points. The cohorts have overlapping company IDs and are not independent samples.

Zero means no recorded label, not no business; multi-label cells overlap.

Multi-label counts can overlap; filter compliance is not industrial advantage.

Existing excerpts do not certify entire old reports; list linkage is not final recognition. Full definitions are on the series page.

Fields can overlap; hits establish search relevance only.

Storage, transport and use require material-compatibility checks

The Hydrogen fuel-cell systems label covers 11 records (22.4% of this cohort). This archive clue raises a verification question about Route-defined storage, transport, refuelling or end-use equipment; it does not establish that these companies already deliver it.

Shared records with Hydrogen Energy Keyword Candidate Study: 46; records in this cohort but outside that set: 3. The intersection/union ratio is 68.7%, a measure of label overlap rather than business collaboration. Read comparison

Shared records with Fuel Cell Bipolar Plate Compressor Keyword Candidate Study: 28; records in this cohort but outside that set: 21. The intersection/union ratio is 57.1%, a measure of label overlap rather than business collaboration. Read comparison