or part of this page is from "ELEMENTS OF FRASCA ROTARY ENGINE DESIGN*"
© 1998 by Joseph F. Frasca
few lessons learned the
Cross shred all scrape
Unfortunately, I used
My scrape paperwork went
into large plastic
lawn bags which when full I'd burn.
It took fourteen complete
drafts to finish
the engine patent application and nearly as many for the pump patent.
That's quite a few bags
of scrape paper.
It appears that various
pages from various
drafts ended up as part of the published patent texts.
Changing the font of the
text from that used in its drafts might help with this [type of]
If you're doing your own
patent drawings and
find that a complete drawings sheet must be redrawn to effect changes,
you'll not want to destroy the first sheet and lose the many hours of
But, before you put the
old sheet of figures
aside for posterity, ink margins between the figures so the sheet is no
longer in a form acceptable as part of a patent application, and won't
be exchangeable with the drawing sheet in the PTO application file.
With the availability of
inexpensive CAD software,
high resolution laser and ink-jet printers, this type of patent file
However, the security of
your CAD files will
have paramount importance..