Excavating Patents (Class 37)
- Process (Class 37/197)
- Railway clearer (Class 37/198)
- Snow or ice surface groomer (Class 37/219)
- With compressor die (Class 37/225)
- With melter (Class 37/227)
- With specific means to facilitate connection to, or disconnection from, vehicle (Class 37/231)
- Vehicle mount with obstacle responsive trip, or yieldable tool (e.g., brush) (Class 37/232)
- Including specific hydraulic control system to position implement (Class 37/234)
- Vehicle mount including power lift (Class 37/235)
- With endless conveyor (Class 37/237)
- Combined or convertible (Class 37/241)
- Motorized rotary excavating tool (Class 37/244)
- Tool prepares wheel path for passage of wheel (Class 37/263)
- Scoop (Class 37/264)
- Scraper blade (Class 37/266)
- Manually powered (Class 37/285)
- With signal, scale, indicator, or inspection means (Class 37/308)
- With means to control dredger operation (e.g., movement of dredged material) in response to sensed condition (Class 37/309)
- By use of submarine or undersea vessel (Class 37/313)
- Adapted to excavate specific discrete material (Class 37/314)
- Suction (Class 37/317)
- Rotary digger (e.g., bucket wheel) (Class 37/337)
- Endless (Class 37/338)
- Grab (Class 37/340)
- Scoop or bucket (Class 37/341)
- With means to scour or scrape (e.g., propeller means, digging teeth, plow) (Class 37/342)
- With vessel, propulsion, or anchor structure (e.g., bank spud, spud brace) (Class 37/345)
- Condition responsive (Class 37/382)
- Including ground supported, grader guiding rail (Class 37/383)
- Rotary digger (Class 37/386)
- Transverse endless digger (Class 37/388)
- Plow with transverse endless conveyor (Class 37/389)
- Plow with transverse conveyor wheel (Class 37/391)
- Plow with inclined axis conveyor wheel (Class 37/393)
- With alarm, indicator, signal, or inspection means (Class 37/413)
- Supported on vehicle between longitudinally spaced ground supports (Class 37/412)
- Mounted rearwardly of vehicle (Class 37/435)
- Manually operated (e.g., two-wheel barrow) (Class 37/434)
- Pushed forwardly of vehicle for filling (Class 37/442)
- Dipper-type (e.g., backhoe bucket) (Class 37/443)
- Scoop or bucket structure, per se (Class 37/444)
- Oscillating or reciprocating (Class 37/447)
- Corner guard (e.g., corner tooth) (Class 37/448)
- Repositionable digging edge (e.g., reversible) (Class 37/449)
- Removable digging edge having integral tooth adaptor (Class 37/450)
- Distinct wear element mounted between teeth (Class 37/451)
- Tooth or adaptor (Class 37/452)
- Specific material (e.g., specialty steel, heat treatment of material, specific hardness test) (Class 37/460)
