The  commissioner  may,  in  his  discretion  cause  several  patents
to  be  issued  for  distinct  and  separate  parts  of  the  thing  patented,
upon  demand  of  the  applicant,  and  upon  payment  of  the  required
fee  for  each  division  of  such  reissued  letters  patent.  Each  division
of  a  reissue  constitutes  the  subject  of  a  separate  specification
descriptive  of  the  part  or  parts  of  the  invention  claimed  in  such
division  ;  and  the  drawing  may  represent  only  such  part  or  parts,
subject  to  the  provisions  of  rule  49.  Unless  it  shall  be  otherwise
ordered,  by  the  commissioner,  all  the  divisions  of  a  reissue  will
issue  simultaneously  ;  if  there  be  controversy  as  to  one,  the  others
will  be  withheld  from  issue  until  the  controversy  is  ended,  unless
he  shall  otherwise  order.     Jiules  of  Prac.  No.  88. '

Where  a  patent  claims  a  combination  of  several  devices,  it  may
be  reissued  to  claim  the  devices  separately,  if  new'and  useful,  even
tliough  the  aggregate  combination  claimed  in  the  original  patent
was  not,  by  itself,  useful,  or  was  even  impracticable  ;  provided  the
reissue  points  out  how  the  devices,  separately  claimed,  may  be
reduced  to  practical  use..  Wheeler  v.  Clipper  Mower,  &c.,  Co.,  2
Pat.  Off.  Oat.  442;  10  Platchf.  181;  6  P'ish.  Pat.  Oas.  1.  But
the  patent  cannot  be  broadened  by  reissuing  it  in  divisions  any
more  than  if  reissued  together.  New  v.  Warren,  22  Pat.  Off.  Gaz.
587,  The  thing  patented  may  be  separated  on  the  reissue  of  a
reissued  patent  as  on  the  first  reissue.  Selden  v.  Stockwell  Self-
lighting  Gas-burner  Co.,  9  Ped.  Pep'r,  390  ;  19  Blatchf.  544  ;  20
Pat.  Off.  Gaz.  1377.
