# K874893: Model 35300 Tracker (TM) Therapy Beam Evaluator

- Pathway: 510(k) (Traditional)
- Applicant: Keithley Instruments, Inc.
- Decided: Feb 17, 1988 after 78 days
- Product code: IYE (Accelerator, Linear, Medical)
- Device class: 2
- Regulation: 21 CFR 892.5050
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
36 later devices descend from it; 2 cite it directly.
0 of 37 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K972211: Multidos, QC6PLUS (1997), 34 descendants of its own
- K062817: PTW David Imrt QC Verification System (2006), 33 descendants of its own
- K072374: Compass (2007), 31 descendants of its own
- K140660: MOBIUS3D (2014), 23 descendants of its own
- K153014: Mobius3D (2016), 13 descendants of its own

Source page: https://510kreport.com/device/K874893
Methodology: https://510kreport.com/methodology