They are business services provider Automatic Data ( ADP), global electrical equipment maker Emerson Electric ( EMR) and paint and specialty chemicals supplier PPG Industries ( PPG).
There are eight categories of weapon, ranging from automatic hardware and machine guns which are prohibited, to hunting equipment allowed with a hunting permit.
The telephone-equipment companies want voice dialling (useful in cars), automatic call-centres, computerised operator-services and messaging that allows users to pick up and send e-mails and faxes on an ordinary telephone anywhere in the world.