Level Or Plumb, Terrestrial Gravitation Responsive Patents (Class 33/365)
- Plural nonparallel axes or plural orientation sensors (Class 33/366.12)
- With compensation of sensed quantity (e.g., acceleration) (Class 33/366.13)
- With pulse or digital processing circuit component (Class 33/366.14)
- Fluent sensor (Class 33/366.15)
- Having light or radiant energy detecting circuit control element (Class 33/366.23)
- Having pendulum sensor (Class 33/366.24)
- Having reactive circuit control element (e.g., inductive, capacitive) (Class 33/366.25)
- Having resistive or contact circuit control element (Class 33/366.26)
- Indicator details (Class 33/366.27)
- Plumb line (i.e., flexible, line suspended plumb bob) (Class 33/392)
- Plural, coacting in intersecting planes (Class 33/395)
- Liquid buoyed (Class 33/396)
- Gimbal mounted (Class 33/397)
- Weight, variable quantity or center of gravity (Class 33/398)
- Indicium adjustably fixed to reference-surface section or to weight (Class 33/399)
- Motion transmitting mechanism drives indicator (e.g., gearing, magnetic coupling) (Class 33/401)
- Means limiting swing (Class 33/402)