Inventor

TOPPING JOHN A

3 patents

⚠️ This page may combine multiple inventors who share the name “TOPPING JOHN A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

QUALITY HERMETICS LIMITED

1 patent

US4029897AJun 14, 1977

Glass seal

QUALITY HERMETICS LIMITED22 citations72

CANADA MINISTER DEFENCE

1 patent

US4199340AApr 22, 1980

Method of forming corrosion-resistant glassceramic-to-metal seals

CANADA MINISTER DEFENCE10 citations71

UNITED KINGDOM GOVERNMENT

1 patent

US3957538AMay 18, 1976

Alkaline battery seal

UNITED KINGDOM GOVERNMENT15 citations68