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You are an expert at summarizing long articles. Proceed to summarize the following text: 
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to solid rod fencing. More particularly, this invention relates to fencing where new or used oil field sucker rods, or plain steel rods are assembled in to fence sections that can be installed on posts in 8, 12, 16, and 24 foot sections or to panels that are approximately 5 feet tall and 8 feet long. 
     2. Prior Art 
     Wood fencing has been utilized traditionally for many years to enclose areas of real estate. Typically, the main purpose of such fencing is to enclose and retain animals within a given space. Metal fencing has also been employed and more recently plastic fencing such as fence components made out of Polyvinyl Chloride (PVC). The present invention, on the other hand, utilizes new or used oil field sucker rods or plain steel rods of the similar size to create fence sections that can be installed onto posts in 8, 12, 16, and 24 foot sections. The rods are positioned to run horizontally with a perpendicular rod welded 2 feet from each end and every 3 or 4 feet in between. The sucker rods can also be made into panels to create portable livestock enclosures. The use of new or used sucker rods in such a manner is believed to be previously unknown. 
     A preliminary search was conducted on the above invention and the following listed patents were uncovered. 
     
       
         
               
               
               
               
             
           
               
                   
                   
               
               
                   
                 Inventor 
                 U.S. Pat. No. 
                 Date 
               
               
                   
                   
               
             
             
               
                   
                 Purvis 
                 5,683,074 
                 Nov. 4, 1997 
               
               
                   
                 Hughes 
                 5,803,647 
                 Sep. 8, 1998 
               
               
                   
                 Verenski 
                 5,615,968 
                 Apr. 1, 1997 
               
               
                   
                 Bolton 
                 4,537,151 
                 Aug. 27, 1985 
               
               
                   
                 Peters 
                 4,067,547 
                 Jan. 10, 1978 
               
               
                   
                 O&#39;Brien 
                 3,469,822 
                 Sep. 30, 1969 
               
               
                   
                 Akins 
                 5,201,498 
                 Apr. 13, 1993 
               
               
                   
                 Knudslien 
                 4,844,424 
                 Jul. 4, 1989 
               
               
                   
                   
               
             
          
         
       
     
     Purvis, U.S. Pat. No. 5,683,074 discloses a temporary guard rail system which uses slip joint  16  as connection means. See Column 5, Lines 25-30, where the segment  16   d  is described as being fabricated to an outside diameter that is slightly smaller than the inside diameter of the external segment  16   e . FIG. 7A shows the rail and the segment as being round where as FIG. 7 shows the corresponding members as being square or rectangular cross-section. 
     Peters, U.S. Pat. No. 4,067,547 discloses a prefabricated fence which uses slip joint connection  16  between fence sections. 
     Akins, U.S. Pat. No. 5,201,498 discloses a fence panel which is provided with bumpers  19 . These resist the tendency of a post to sink into soft ground. 
     Knudslien, U.S. Pat. No. 5,844,424 discloses a fence panel which utilizes both mud feet and panel connectors  14  and  15 . 
     SUMMARY OF THE INVENTION 
     New or used oil field sucker rods or plain steel rods are assembled into fence sections that can be installed onto posts in 8, 12, 16, and 24 foot sections. A predetermined number or rods (from 4 to 7) are positioned to run horizontally with a perpendicular rod welded two feet from each end and every 3 or 4 feet in between. The perpendicular rods “stays” hold the fence section together and give the entire section structural strength. Furthermore, a slip coupling is welded on one end of each rod on the same end of the panel (the female end) to enable the fence sections to be joined together in a continuous fashion. The slip coupling is made from pipe with an inside diameter that will fit snugly over the end of rod being used in the fence section. In another embodiment the sucker rods are assembled into portable livestock panels. These panels are approximately 5 feet tall and 8 feet long. A predetermined number of rods (5 to 7) 8 feet in length, are positioned to run horizontally with a perpendicular rod 5 feet in length welded to each end and known as the legs. At the lower end of the legs, the steel is bent into a 90-degree turn which then extends approximately 12 inches parallel to the upper rails. The purpose of these extensions is to prevent the panel from sinking into the mud. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a side elevation of a fence section made from seven (7) sucker rods each approximately 24 feet in length. 
     FIG. 2 is an exploded side elevation showing a right-hand fence section attached to posts and the left-hand fence section positioned to engage the left-hand end of the right fence section. 
     FIG. 3 is a view taken along section line  3 — 3  of FIG. 2 showing the rod of the left-hand fence section about to be inserted into the coupling member associated with the right-hand fence section. 
     FIG. 4 is a view similar to FIG. 3 but showing where the left-hand fence section has been inserted into the coupling of the right-hand fence section. 
     FIG. 5 is a fragmentary view taken at right angles to one of the rods showing the means of attachment of the horizontal rod to the vertical post. 
     FIG. 6 is a plan view of a fence such as the right-hand portion of FIG. 2 showing how the fence can flex when force is exerted against the rods. 
     FIG. 7 is a plan view showing the fence section of FIG. 6 arranged in end to end relation and curved to form a circular enclosure. 
     FIG. 8 is a partial and enlarged view of the fence of FIG.  7 . 
     FIG. 9 is a view of a panel formed from the sucker rods used in the fence of FIG. 1 in association with another similar fence panel. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to the drawings, FIG. 1 shows a plurality of sucker rods  20  that extend for approximately 24 feet. A perpendicular sucker rod  22  is attached approximately 2 feet in from the right-hand end of the section shown in FIG.  1  and another perpendicular rod  24  is positioned in 2 feet from the other end of the section. Intermediate rods  26  are positioned approximately 4 feet apart. A coupling  28  (see also FIGS. 2,  3 , and  4 ) is welded to the left-hand end of each of the horizontal rods  20  shown in FIG.  1 . As best shown in FIGS. 3 and 4, the coupling  28  is a piece of pipe having an inner diameter  30  slightly in excess of the outside diameter of the rod  20 . Thus, the couplings  28  are all positioned at the left-hand end (female end) of the fence section shown in FIG.  1 . This will permit the right-hand end of the fence section shown to the left in FIG. 2 to fit into the couplings  28  of the right-hand fence section shown in FIG.  2 . 
     As shown in FIGS. 2 through 9 the fence construction or panel of FIG. 1 is preferably attached to a series of vertical posts  34  which are preferably spaced about 8 feet apart. As best shown in FIG. 5 the individual horizontal rods  20  are attached to the vertical post  34  by means of metal clips  36  which are welded at the upper and lower ends to the post  34 . At the left-hand end of the right section in FIG. 2 the clips  36  are actually welded over the couplings  28  which are positioned on the left-hand ends of the rods  20 . 
     As shown in FIG. 6 the rods  20  give considerable flexibility to the fence, more so than a wooden fence or a PVC fence. Thus, if a force F is applied in the center of the structure shown in FIG. 6 the rod  20  will merely bow and then thereafter return to its position after the force has been removed. In addition to being flexible the rods  20  of the present invention are quite strong and durable. It should be understood that the rods  20  shown in the drawings and described herein are five eighths inch solid steel rods having ninety thousand pounds tensile strength. 
     The flexibility of the fence construction of the present invention is further shown in FIG. 7 where a series of posts  34  are arranged in a circular pattern. The manner in which the rods  20  are bent is simply that when the first segment X has been placed between a pair of posts  34 , as shown in FIG.  8  and the corresponding circled portion of FIG. 7, the next adjacent portion (see now FIG. 2) Y is positioned so that the ends of the rods  20  are received in the couplings  28  of section X thereafter the section Y is bent until it can be attached to the next succeeding post and clipped in place using the clips  36 . 
     FIG. 9 shown a modification of the present invention where the sucker rods  20  are assembled in the form of a panel which can be connected to a similar panel to form a circular enclosure or pen. Thus, referring to FIG. 9, a plurality of sucker rods  20  are arranged horizontally and are connected in 8 foot lengths to vertical end rods  40  which will be further described. An intermediate vertical rod  42  connects the centers of the horizontal rods  20  in much the same manner as the rod  22  shown in FIG.  1 . The rods  40  are preferably, but not necessarily, 5 feet in height. Each vertical rod  40  constitutes a leg whose lower end  44  is bent at a 90 degree angle to the main portion  40  and extends approximately 12 inches parallel to the upper rails  20 . The purpose of the extension  44  is to prevent the panel from sinking into the mud. The vertical members  40  are fitted with loops  46 ,  48  and  50  on the left-hand member  40  of the panel and with loops  52 ,  54 , and  56  on the right-hand rod  40  shown in FIG.  9 . The purpose of these loops is to permit attachment to an adjacent and identical panel section such as shown to the right on FIG.  9 . The loops  46  through  56 , inclusively, are nothing more than little eyes with a hole through and welded to the rods  40 . To connect the panel shown in FIG. 9 with the panel section portion shown to the right of FIG. 9, all one need do is employ a couple of J rods  58  which can be used to hold the panel sections together. Briefly, one would move the panel section to the right in FIG. 9 close to the left-hand portion until the loops  46  and  48  are positioned above and below the loop  52 , at which time the upper J rod  58  is slipped through the holes of these loops. Simultaneously, the lower J rod  58  is inserted through the loops  52 ,  54 , and  56  which are now in alignment. The panel of FIG. 9 is likewise flexible as shown in FIG. 6 where a large animal such as a horse would push against the side of the panel. The rods  20  would merely flex and not break.

Summary:
A fence structure made from steel rods approximately five eighths inch in diameter and having a tensile strength of about ninety thousand pounds, the fence structure comprising a plurality of horizontally extending and vertically spaced rods interconnected by a plurality of horizontally spaced vertical rods which are welded at their points of intersection to the horizontal rods.