Vacuum Cleaners Discussions

OK, just purchased a Hoover Platinum Bagged Upright and was marveling at the HEPA bag inside(Review posted for those interested). Anyone know who came up with the HEPA cloth bag first or who used it first?

If you can find and use a pre-motor HEPA filter, at least the dust/dirt overspray from the paper bags will not enter into the motor compartment and degrade motor performance and efficiency over time.

Carmine D.