I saw some mention of Rolf's paired spoke patent in the archives (most
recently Jobst), but I was looking at the patent today and found that
it doesn't even apply to production Rolf wheels. Previous mentions of
the patent talked about how prior art trumped it (Lovelace, 1890). This
isn't quite right because the Rolf patent is not for paired spoking
alone, but for a strange invention where they have some spokes coming
radially out of the center of the hub.

So they've got the now-ubiquitous pairs evenly spaced around the hub
and rim, then these centerline spokes that go out to the rim
symmetrically in between two pairs. Here's an image from the patent
(there are 3 pairs of spokes and 3 solo centerline spokes -- for an
interesting 9-spoke wheel):

Spokes are for cry-babies, notice how elegant a wheel becomes without all
that clutter http://www.finalkick.com/store/wheel-rolf-vigor.html