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Various Line Types Used in a Patent Illustration and Patent Drawings

As we discussed earlier creating patent drawings are not like drawings that we did in our school days. Here we have a set of rules those needs to be followed religiously and failing which could put our objective in jeopardy. Apart from general patent drawing rules, we have also set of rules for creating various Line Types. Below are some of the important line types those we use in a patent illustration.

Read Also: Patent Drawings 101

Important kinds of Line-Types Used in Patent Drawings

Solid Line: Solid lines are the most common type of line types we use in patent drawing. The solid line represents the claimed portion of the invention.

Phantom Line: Phantom lines are another kind of line-types those are used in patent drawings. Unlike solid lines, these Phantom line represents the disclaimed portion of an invention. There are many cases when Phantom lines are interchangeably used for dashed-line which is not the appropriate way of putting it.

Projected Line: The third important kind of line type we use in a patent illustration is the ‘Projected Line’ and is widely used by draftspersons to depict a part or a device that detaches or comes apart from another embodiment. Projected lines are mostly used in exploded views of patent illustrations.

 Hidden Line: Hidden lines are dashed lines which are used by a draftsperson when a part is obstructed by another part, device or embodiment.

Projected Line: Projected lines are used by draft persons mostly in exploded views of a patent drawing. Projected lines are used by patent drawing professionals to represent a part or device that detaches or comes apart from another embodiment.

Boundary Line: Boundary lines which are represented as dash-dot-dash are another kind of line types that are used mostly in design patents and are used to separate disclaimed areas from the claimed ones on an embodiment.

It’s important to take care of the lines while using them in a patent drawing. Inappropriate use of line-types could put your objective in jeopardy and hence, should be used according to the rules.


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