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Patent Questions and Advice / Re: Line Drawings
« on: March 14, 2015, 05:26:13 PM »

MINIMUM margins are:
Top and Left 1" (25 mm)
Right 5/8" (15 mm)
Bottom 3/8" (10 mm)

From How to Make Patent Drawings by Jack Lo and David Pressman:
"Crosshairs, as shown in Illustration 8.2, should be placed at opposite corners of the sight (usable portion of a sheet within the margins) to indicate its boundaries. The centers of the crosshairs should be centered on the corners, so that the outer arms of the crosshairs lie in the margins. The crosshairs can be placed on either the lower-left and upper-right or upper-left and lower-right corners, and should be about 2 cm (3/4") long."
But in Illustration 8.2 they look a lot smaller than this.

Patent It Yourself by David Pressman says they should be about 1.5 cm (0.5") long but also shows them smaller in Fig 10B.

Page number can be put in upper right corner if drawing is too close to center of upper margin.

Avoid landscape orientation whenever possible.

Patent Questions and Advice / Re: Patent Drawing or Photos
« on: February 23, 2015, 07:42:38 PM »
Where would someone post to find someone that does drawings?

I'm doing this as a hobby for $30-$50 a sheet but you can also have your drawings done in India for $25-$40 a sheet !
I haven't spent a lot of time researching but one site I've found is

I used to pay $100-$150 a sheet more than 10 years ago but wasn't happy with the drawings I got so I started doing them myself.
Now I don't see how anybody in the U.S. can make a living competing with draftspeople overseas.

I've read that the reason for using only odd or even numbers to begin with is so that you can add new numbers later on and still keep your part numbers in a logical order. I also like to start with 100 or 101 for the first embodiment, 200 or 201 for the second embodiment and so on, but this only works if you don't have more than 100 parts in each embodiment.

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