# Relationship history for MSHA mine 0501899

Current hierarchy: **Lori L  Soden; Richard H Soden → Persolite Products Inc → Persolite Products Inc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Persolite Products Inc → Persolite Products Inc; 1950-01-01 to 1989-03-19; source msha-controller-operator-history
- **controller_controls_mine:** Herman O Freudenberg → Persolite Products Inc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Herman O Freudenberg → Persolite Products Inc; 1950-01-01 to 1989-03-19; source msha-controller-operator-history
- **operator_operates_mine:** Persolite Products Inc → Persolite Products Inc; 1989-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_mine:** Lori L  Soden et al → Persolite Products Inc; 1989-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lori L  Soden et al → Persolite Products Inc; 1989-03-20 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Richard H Soden et al → Persolite Products Inc; 1989-03-20 to current/open; source msha-controller-operator-history