Handrail for variable speed moving walkway
Hardening developers for silver halide photography
Hardening fixer for photographic silver halide material
Heat developable imaging materials and process
Heat developable light-sensitive material
High contrast continuous tone developer and process of use
High contrast, rapid access, air stable, regenerable iron chelat
High efficiency active electrostatic air filter and method...
High efficiency permanent air filter and method of manufacture
High efficiency permanent air filter and method of manufacture
High efficiency synthetic filter medium
High speed tunnel fan with electrostatic filter
High temperature processing of photographic silver halide materi
High-efficiency air filtering apparatus
Holographic recording medium containing a 2-cyanoacrylate polyme
Housing for electronic air cleaner
Housing for electronic air cleaner
Hybrid color photographic elements and processes for developing
Hydrophilic-colloid silver halide emulsion hardened with a bisvi