USD224303S - Coupling ring for drainage pipes - Google Patents
Coupling ring for drainage pipes Download PDFInfo
- Publication number
- USD224303S USD224303S US D224303 S USD224303 S US D224303S
- Authority
- US
- United States
- Prior art keywords
- coupling ring
- drainage pipes
- drainage
- pipes
- coupling
- Prior art date
Links
- 230000001808 coupling Effects 0.000 title description 8
- 238000010168 coupling process Methods 0.000 title description 8
- 238000005859 coupling reaction Methods 0.000 title description 8
- 239000007990 PIPES buffer Substances 0.000 description 2
Images
Description
Patented July 18, 1972 224,303- COUPLING RING FOR DRAINAGE PIPES Hakan Georg Fritiof Bergkvist, Vastbovagen 47, 8-331 00 Varnamo, Sweden Filed Nov. 20, 1970, Ser. No. 26,091
Term of patent 14 years Int. Cl. D23-01 US. Cl. D23-43 The figure is a perspective view of a coupling ring for References Cited drainage pipes showing my new design. UNITED STATES PATENTS I claim:
The ornamental design for a coupling ring for drainage as shqwn' 3, 360j283 12/1967 Guthrie 285-235 3,521,913 7/1970 Verhein et a1. 285109 JAMES R. LARGEN, Primary Examiner
Family
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