Measuring electrical charge
http://en.wikipedia.org/wiki/Silver_nanoparticles
http://en.wikipedia.org/wiki/Endothelium
http://en.wikipedia.org/wiki/Fungal_contamination_of_contact_lenses; Patent family with 4 members
http://en.wikipedia.org/wiki/Nitrogen_oxide
http://en.wikipedia.org/wiki/Heparin
Control system
Patent family with 8 members
Textile material
Patent family with 2 members
Patent family with 10 members
Patent family with 5 members
Panel
Structural element
Washer
Mine
Wood
Patent family with 7 members