| Class Number |
Class Name |
Patents |
| 172/1 |
Processes |
112 |
| 172/126 |
With earth marker |
63 |
| 172/13 |
Lawn edger |
57 |
| 172/133 |
Diverse tools |
12 |
| 172/19 |
Sod cutter |
87 |
| 172/2 |
Automatic power control |
243 |
| 172/204 |
Alternating for right or left hand operation (other than scraper) |
6 |
| 172/21 |
Lawn aerator or perforator, or plug remover |
176 |
| 172/23 |
Driven from or guided by stationary object, or anchored |
9 |
| 172/233 |
With obstruction feeler for moving or releasing implement to avoid obstruction (includes dam former) |
6 |
| 172/236 |
Ground engageable draft responsive lever |
2 |
| 172/238 |
Ground support moved vertically relative to frame by draft means |
2 |
| 172/239 |
Draft, pitch or ground level responsive depth control |
37 |
| 172/240 |
With ground support engageable with ground for transport only |
35 |
| 172/245 |
Convertible; or changeable by disassembly or assembly |
13 |
| 172/255 |
Turn lifts tool off or lowers tool into ground |
5 |
| 172/256 |
Propulsion unit guided by walking attendant or part of articulated vehicle |
16 |
| 172/260.5 |
Having tool overload shift controlled by a fluid pressure device |
49 |
| 172/261 |
Overload shifting |
23 |
| 172/27 |
With means for cutting or shredding plants without soil disturbance |
4 |
| 172/272 |
With means to facilitate mounting of implement on motor vehicle |
243 |
| 172/278 |
With wheel steering or actuator for horizontally angling wheel axis |
9 |
| 172/29 |
With means for shifting surface material without soil disturbance |
16 |
| 172/292 |
Specific propelling means |
27 |
| 172/293 |
Series of like elements sequentially operated by power cycle |
1 |
| 172/297 |
Tool forward of rear of motor vehicle |
15 |
| 172/310 |
Plural wheeled implements |
44 |
| 172/315 |
Actuator on trailing implement, controlled from propelling vehicle |
16 |
| 172/317 |
Actuator on vehicle for relatively moving parts of trailing implement |
2 |
| 172/32 |
With separating after earth working |
21 |
| 172/321 |
Actuator on vehicle for moving wheeled implement |
7 |
| 172/322 |
With actuator for rocking tool about wheel axis |
11 |
| 172/324 |
With actuator on trailing ground supported frame for moving draft means laterally or vertically |
13 |
| 172/329 |
Guided by walking attendant; supported, propelled, or held in position by attendant |
8 |
| 172/33 |
With power driven moldboard, conveyer or handler |
42 |
| 172/34 |
Complete apparatus adapted for use upside down |
2 |
| 172/35 |
With drive means for tool or cleaner |
7 |
| 172/382 |
Multiple level tools |
11 |
| 172/383 |
Axis of rotation of wheel lockable or angularly adjustable |
11 |
| 172/387 |
With wheel substitute (e.g., runner, etc.) |
13 |
| 172/395 |
With ground support vertically adjustable relative to frame |
40 |
| 172/430 |
With indicating or sighting means |
80 |
| 172/431 |
With seat or attendant's station |
9 |
| 172/437 |
With tool sharpener |
0 |
| 172/438 |
Combined |
30 |
| 172/439 |
Mast type hitch (e.g., three point hitch, etc.) |
205 |
| 172/452 |
With actuator adapted to lift tool for transport on wheeled frame or broadly claimed implement |
51 |
| 172/507 |
Ground support movable horizontally |
5 |
| 172/508 |
With guard, shield or plant diverter |
27 |
| 172/518 |
Rolling, rotating or orbitally moving tool |
28 |
| 172/605 |
Shiftable hitch moves tool relative to frame |
20 |
| 172/606 |
With cleaner |
13 |
| 172/611 |
With weight |
48 |
| 172/612 |
Fabric or flexible tool |
40 |
| 172/613 |
Plural relatively movable tools |
4 |
| 172/663 |
With actuator |
11 |
| 172/669 |
With wheel; or supported on wheel frame or broadly claimed implement |
16 |
| 172/677 |
With draft detail |
102 |
| 172/681 |
Tool, standard or connection |
18 |
| 172/776 |
Miscellaneous (e.g., frames, etc.) |
164 |
| 172/777 |
Scraper supports narrow depending tool |
33 |
| 172/779 |
Scraper position automatically controlled by linkage for levelling |
11 |
| 172/780 |
Scraper between widely spaced front and rear ground supports |
20 |
| 172/781 |
Scraper between front and rear ground supports of vehicle |
37 |
| 172/799.5 |
Towed scraper with ground support wheels |
50 |
| 172/810 |
Mounting for pushed tool at end of motor vehicle |
44 |
| 172/900 |
Plant thinners |
3 |
