# Grass-Telefactor Product Group

- Location (FDA's records): W. Conshohocken, PA
- FDA decisions: 12 (1986–1999): 12 510(k) clearances
- Product codes: OLV (4), GWQ (3), EEG (1), GYE (1), GWS (1), GWK (1), OMB (1)
- Predicates its devices cite: 4 (4 its own); citations of its devices by later devices: 8 (4 its own)
- Recalls linked to its devices: 0 (0 Class I)
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Firms that cite its devices most
- Astro-Med, Inc.: 2 (https://510kreport.com/company/astro-med)
- Grass-Telefactor Divison: 1 (https://510kreport.com/company/grass-telefactor-divison)
- Grass Instrument Co.: 1 (https://510kreport.com/company/grass-instrument)

## Its most-cited devices
- K972202: Deeg-Lite (1997), cited by 2
- K992291: H20- Tethered Option (1999), cited by 2
- K974587: H2O (1998), cited by 2
- K884937: Beehive-64 or Beehive-32, Digital Eeg Recording (1989), cited by 1
- K870450: Szac-16 Seizure Analysis Computer (1987), cited by 1

## Recent decisions
- K992291: H20- Tethered Option (Aug 6, 1999)
- K974583: Deeglite (Jun 9, 1998)
- K974587: H2O (Mar 9, 1998)
- K972202: Deeg-Lite (Jul 23, 1997)
- K925838: Telefactor D/Eeg-32 (Apr 30, 1993)
- K884937: Beehive-64 or Beehive-32, Digital Eeg Recording (Apr 14, 1989)
- K870432: A1-A2 Ambulatory Eeg Cassette Recorder (May 8, 1987)
- K871480: STD-228  Spectral Trend Display (May 1, 1987)

Source page: https://510kreport.com/company/grass-telefactor-product-group