US Patent Rennemann No. 3,625,511
 
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                                               Examiner: R. C. Pinkham and W. R. Browne

                                           References Cited Patent Documents

                Joseph H. Shank 1926                 Eric Barkschat  1953                    R. G. Diego  1956         
                         Gymnasium Bed               Exercising Apparatus/Cabinet          Exercising Apparatus    
                 US Patent No.1 582 487               US Patent No. 2 632 645             US Patent No. 2 733 922  

                                 

                                                      G. W. Freshour 1963 US Patent 3 268 224                                    
                               Supporting Frame for Bar Bells and Hand    Opperated Exercising Device      

                                          
                                             Examiner:  R. C. Pinkham and W. R. Browne

                                M. Gaul 1967  US Patent 3 342 485  Exercising Bench          
  
                                                 
                                                  Examiner R. C. Pinkham and R. J. Apley