RAYMOND IV JOHNSON
Electrician at Fm 429, Kaufman, TX
License number
Texas 312803
Expiration Date
Jul 27, 2016
Category
Apprentice Electrician
Address
Address
8849 Fm 429, Kaufman, TX 75142
Phone
(972) 932-3835
Professional information
Drainage Pipe
US Patent:
5836716, Nov 17, 1998
Filed:
Feb 5, 1997
Appl. No.:
8/795988
Inventors:
Wm. Ralph Johnson - Coppell TX
Raymond Johnson - Kaufman TX
Raymond Johnson - Kaufman TX
International Classification:
E02B 1100
US Classification:
405 43
Abstract:
A subsurface drainage pipe includes a tubular main pipe body having inner and outer surfaces and a longitudinal central axis. Walls defining a plurality of slot-shaped apertures through the inner and outer surfaces along the length of the main pipe body are provided. The slot shaped apertures are angled with respect to the central axis.