US178847A - Improvement in blackboard-rubbers - Google Patents
Improvement in blackboard-rubbers Download PDFInfo
- Publication number
- US178847A US178847A US178847DA US178847A US 178847 A US178847 A US 178847A US 178847D A US178847D A US 178847DA US 178847 A US178847 A US 178847A
- Authority
- US
- United States
- Prior art keywords
- blackboard
- rubbers
- improvement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920001971 elastomer Polymers 0.000 title 1
- 239000005060 rubber Substances 0.000 title 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
- A47L11/02—Floor surfacing or polishing machines
- A47L11/10—Floor surfacing or polishing machines motor-driven
- A47L11/14—Floor surfacing or polishing machines motor-driven with rotating tools
- A47L11/16—Floor surfacing or polishing machines motor-driven with rotating tools the tools being disc brushes
- A47L11/164—Parts or details of the brushing tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L21/00—Blackboard or slate cleaning devices
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Vibration Prevention Devices (AREA)
Description
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US178847A true US178847A (en) | 1876-06-20 |
Family
ID=2248254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US178847D Expired - Lifetime US178847A (en) | Improvement in blackboard-rubbers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US178847A (en) |
-
0
- US US178847D patent/US178847A/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US178096A (en) | Improvement in clothes-sprinklers | |
| US182377A (en) | Improvement in sugar-mills | |
| US175866A (en) | Improvement in fog-signals | |
| US173478A (en) | Improvement in zitherns | |
| US179931A (en) | Improvement in nut-locks | |
| US185264A (en) | Improvement in cigar-machines | |
| US185800A (en) | Improvement in vehicle-hubs | |
| US174205A (en) | Improveivient in hog-traps | |
| US183071A (en) | Improvement in-shaft-couplings | |
| US192879A (en) | Improvement in store-reachers | |
| US183389A (en) | Tissitoet | |
| US207431A (en) | Improvement in bootees | |
| US202318A (en) | Improvement in game apparatus | |
| US222770A (en) | Improvement in hose | |
| US217727A (en) | Improvement in gun-wads | |
| US161097A (en) | Improvement in millstone-dress | |
| US177454A (en) | Improvement in fire-boxes for boilers | |
| US210288A (en) | Improvement in bale-ties | |
| US181781A (en) | Improvement in corsets | |
| GB187600824A (en) | ||
| US186596A (en) | Improvement in grain-elevators | |
| US198821A (en) | Improvement in rowlocks | |
| US194406A (en) | Improvement in washing-machines | |
| US166127A (en) | Improvement in plows | |
| US188706A (en) | Improvement in piano-actions |