Inventor

KNIFFIN JOHN M

US4 patents

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

SUPRA PROD INC

2 patents

US5705991AJan 6, 1998

Access control device featuring key ordering or key simultaneity

SUPRA PROD INC176 citations96

US5280518AJan 18, 1994

Electronic security system

SUPRA PROD INC203 citations92

SLC TECHNOLOGIES INC

1 patent

US6072402AJun 6, 2000

Secure entry system with radio communications

SLC TECHNOLOGIES INC429 citations96

TEKTRONIX INC

1 patent

US4560989ADec 24, 1985

Method and apparatus for accelerating the recording rate of a CRT graphic recorder

TEKTRONIX INC6 citations59